diff --git a/internal/tui/detail.go b/internal/tui/detail.go
index 2130ddd..80a2d55 100644
--- a/internal/tui/detail.go
+++ b/internal/tui/detail.go
@@ -115,7 +115,7 @@ func (d detailModel) previewView(width int) string {
 		bodyWidth = 20
 	}
 	r, _ := glamour.NewTermRenderer(
-		glamour.WithStylePath("dark"),
+		glamour.WithStylePath(glamourStyle()),
 		glamour.WithWordWrap(bodyWidth),
 	)
 	rendered, err := r.Render(e.Body)
diff --git a/internal/tui/help.go b/internal/tui/help.go
index ef3bd18..a5e3958 100644
--- a/internal/tui/help.go
+++ b/internal/tui/help.go
@@ -33,6 +33,7 @@ func renderHelp(width, height int) string {
 			{"2", "cards view"},
 			{"s", "cycle sort (cards)"},
 			{"i", "cycle intent (cards)"},
+			{"T", "cycle theme"},
 		}},
 		{"Actions", [][2]string{
 			{"d", "delete (with confirm)"},
diff --git a/internal/tui/keys.go b/internal/tui/keys.go
index e68b7be..a0d1723 100644
--- a/internal/tui/keys.go
+++ b/internal/tui/keys.go
@@ -34,6 +34,7 @@ type keyMap struct {
 	Tab        key.Binding
 	ToggleRail key.Binding
 	Stumble    key.Binding
+	Theme      key.Binding
 }
 
 var keys = keyMap{
@@ -68,4 +69,5 @@ var keys = keyMap{
 	Tab:        key.NewBinding(key.WithKeys("tab"), key.WithHelp("tab", "focus cycle")),
 	ToggleRail: key.NewBinding(key.WithKeys("ctrl+b"), key.WithHelp("ctrl+b", "toggle tag rail")),
 	Stumble:    key.NewBinding(key.WithKeys("S"), key.WithHelp("S", "stumble")),
+	Theme:      key.NewBinding(key.WithKeys("T"), key.WithHelp("T", "theme")),
 }
diff --git a/internal/tui/model.go b/internal/tui/model.go
index 5e51c8e..abdf619 100644
--- a/internal/tui/model.go
+++ b/internal/tui/model.go
@@ -105,6 +105,8 @@ type model struct {
 }
 
 func newModel(store *db.Store) model {
+	loadTheme()
+	applyTheme()
 	inp := newInputModel()
 	inp.ti.Focus()
 	return model{
@@ -565,6 +567,10 @@ func (m model) updateBrowse(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		}
 		return m, nil
 
+	case "T":
+		t := cycleTheme()
+		return m, m.setStatus("theme: " + t.Name)
+
 	case "i":
 		if m.mode == modeCards && m.state == stateList {
 			m.cards.setIntent(m.cards.intent.next())
diff --git a/internal/tui/stumble.go b/internal/tui/stumble.go
index e35eaf4..d897bdb 100644
--- a/internal/tui/stumble.go
+++ b/internal/tui/stumble.go
@@ -111,7 +111,7 @@ func (s stumbleModel) view() string {
 		bodyWidth = 20
 	}
 	r, _ := glamour.NewTermRenderer(
-		glamour.WithStylePath("dark"),
+		glamour.WithStylePath(glamourStyle()),
 		glamour.WithWordWrap(bodyWidth),
 	)
 	rendered, err := r.Render(e.Body)
diff --git a/internal/tui/styles.go b/internal/tui/styles.go
index 637e0f5..f744ca2 100644
--- a/internal/tui/styles.go
+++ b/internal/tui/styles.go
@@ -3,147 +3,97 @@ package tui
 import "github.com/charmbracelet/lipgloss"
 
 var (
-	subtle    = lipgloss.AdaptiveColor{Light: "#D9DCCF", Dark: "#383838"}
-	highlight = lipgloss.AdaptiveColor{Light: "#874BFD", Dark: "#7D56F4"}
-	dim       = lipgloss.AdaptiveColor{Light: "#A49FA5", Dark: "#777777"}
-
-	titleStyle = lipgloss.NewStyle().
-			Bold(true).
-			Foreground(highlight).
-			PaddingLeft(1)
-
-	statusStyle = lipgloss.NewStyle().
-			Foreground(dim).
-			PaddingLeft(1)
-
-	listItemStyle = lipgloss.NewStyle().
-			PaddingLeft(4)
-
-	selectedItemStyle = lipgloss.NewStyle().
-				PaddingLeft(1).
-				Bold(true).
-				Foreground(highlight).
-				SetString("›")
-
-	glyphStyle = lipgloss.NewStyle().
-			Width(2)
-
-	completedGlyphStyle = lipgloss.NewStyle().
-				Width(2).
-				Foreground(dim)
-
-	tagStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#43BF6D", Dark: "#73F59F"})
-
-	idStyle = lipgloss.NewStyle().
-		Foreground(dim)
-
-	inputPromptStyle = lipgloss.NewStyle().
-				Foreground(highlight).
-				Bold(true)
-
-	detailHeaderStyle = lipgloss.NewStyle().
-				Bold(true).
-				Foreground(highlight).
-				MarginBottom(1)
-
-	detailBodyStyle = lipgloss.NewStyle().
-			PaddingLeft(2).
-			PaddingTop(1)
-
-	helpStyle = lipgloss.NewStyle().
-			Foreground(dim).
-			PaddingLeft(1)
-
-	errorStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.Color("#FF0000")).
-			PaddingLeft(1)
-
-	dateHeaderStyle = lipgloss.NewStyle().
-			Foreground(dim).
-			PaddingLeft(1)
-
-	pinnedStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#D4A017", Dark: "#FFD700"})
-
-	filterPillStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#43BF6D", Dark: "#73F59F"}).
-			Bold(true)
-
-	helpKeyStyle = lipgloss.NewStyle().
-			Foreground(highlight).
-			Bold(true).
-			Width(18)
-
-	helpDescStyle = lipgloss.NewStyle().
-			Foreground(dim)
-
-	affordanceStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#5B8EF0", Dark: "#7AAFFF"}).
-			Bold(true)
-
-	useCountStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#B07D3A", Dark: "#D4A54A"})
-
-	modeStyle = lipgloss.NewStyle().
-			Foreground(dim).
-			Bold(true)
-
-	detailLabelStyle = lipgloss.NewStyle().
-				Foreground(highlight).
-				Bold(true)
-
-	detailValueStyle = lipgloss.NewStyle().
-				Foreground(lipgloss.AdaptiveColor{Light: "#555555", Dark: "#BBBBBB"})
-
-	checkDoneStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#43BF6D", Dark: "#73F59F"})
-
-	checkPendingStyle = lipgloss.NewStyle().
-				Foreground(dim)
-
-	searchPillStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#E06C75", Dark: "#E06C75"}).
-			Bold(true)
-
-	gutterStyle = lipgloss.NewStyle().
-			Foreground(dim)
-
-	drawerBorderStyle = lipgloss.NewStyle().
-				Foreground(dim)
-
-	drawerHintsStyle = lipgloss.NewStyle().
-				Foreground(dim).
-				PaddingLeft(2)
-
-	drawerPreviewStyle = lipgloss.NewStyle().
-				Foreground(lipgloss.AdaptiveColor{Light: "#555555", Dark: "#AAAAAA"}).
-				PaddingLeft(2)
-
-	separatorStyle = lipgloss.NewStyle().
-			Foreground(dim)
-
-	hintKeyStyle = lipgloss.NewStyle().
-			Foreground(highlight).
-			Bold(true)
-
-	hintDescStyle = lipgloss.NewStyle().
-			Foreground(dim)
-
-	railHeaderStyle = lipgloss.NewStyle().
-			Bold(true).
-			Foreground(dim)
-
-	railTagStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#43BF6D", Dark: "#73F59F"})
-
-	railActiveTagStyle = lipgloss.NewStyle().
-				Foreground(lipgloss.AdaptiveColor{Light: "#43BF6D", Dark: "#73F59F"}).
-				Bold(true)
-
-	railCountStyle = lipgloss.NewStyle().
-			Foreground(dim)
-
-	stumbleAgeStyle = lipgloss.NewStyle().
-			Foreground(lipgloss.AdaptiveColor{Light: "#cc4400", Dark: "#fab387"})
+	titleStyle          lipgloss.Style
+	statusStyle         lipgloss.Style
+	listItemStyle       lipgloss.Style
+	selectedItemStyle   lipgloss.Style
+	glyphStyle          lipgloss.Style
+	completedGlyphStyle lipgloss.Style
+	tagStyle            lipgloss.Style
+	idStyle             lipgloss.Style
+	inputPromptStyle    lipgloss.Style
+	detailHeaderStyle   lipgloss.Style
+	detailBodyStyle     lipgloss.Style
+	helpStyle           lipgloss.Style
+	errorStyle          lipgloss.Style
+	dateHeaderStyle     lipgloss.Style
+	pinnedStyle         lipgloss.Style
+	filterPillStyle     lipgloss.Style
+	helpKeyStyle        lipgloss.Style
+	helpDescStyle       lipgloss.Style
+	affordanceStyle     lipgloss.Style
+	useCountStyle       lipgloss.Style
+	modeStyle           lipgloss.Style
+	detailLabelStyle    lipgloss.Style
+	detailValueStyle    lipgloss.Style
+	checkDoneStyle      lipgloss.Style
+	checkPendingStyle   lipgloss.Style
+	searchPillStyle     lipgloss.Style
+	gutterStyle         lipgloss.Style
+	drawerBorderStyle   lipgloss.Style
+	drawerHintsStyle    lipgloss.Style
+	drawerPreviewStyle  lipgloss.Style
+	separatorStyle      lipgloss.Style
+	hintKeyStyle        lipgloss.Style
+	hintDescStyle       lipgloss.Style
+	railHeaderStyle     lipgloss.Style
+	railTagStyle        lipgloss.Style
+	railActiveTagStyle  lipgloss.Style
+	railCountStyle      lipgloss.Style
+	stumbleAgeStyle     lipgloss.Style
 )
+
+func init() {
+	applyTheme()
+}
+
+func applyTheme() {
+	t := activeTheme()
+	accent := lipgloss.Color(t.Accent)
+	dim := lipgloss.Color(t.Dim)
+	muted := lipgloss.Color(t.Muted)
+	ok := lipgloss.Color(t.Ok)
+	todo := lipgloss.Color(t.Todo)
+	event := lipgloss.Color(t.Event)
+	remind := lipgloss.Color(t.Remind)
+	danger := lipgloss.Color(t.Danger)
+
+	titleStyle = lipgloss.NewStyle().Bold(true).Foreground(accent).PaddingLeft(1)
+	statusStyle = lipgloss.NewStyle().Foreground(dim).PaddingLeft(1)
+	listItemStyle = lipgloss.NewStyle().PaddingLeft(4)
+	selectedItemStyle = lipgloss.NewStyle().PaddingLeft(1).Bold(true).Foreground(accent).SetString("›")
+	glyphStyle = lipgloss.NewStyle().Width(2)
+	completedGlyphStyle = lipgloss.NewStyle().Width(2).Foreground(dim)
+	tagStyle = lipgloss.NewStyle().Foreground(ok)
+	idStyle = lipgloss.NewStyle().Foreground(dim)
+	inputPromptStyle = lipgloss.NewStyle().Foreground(accent).Bold(true)
+	detailHeaderStyle = lipgloss.NewStyle().Bold(true).Foreground(accent).MarginBottom(1)
+	detailBodyStyle = lipgloss.NewStyle().PaddingLeft(2).PaddingTop(1)
+	helpStyle = lipgloss.NewStyle().Foreground(dim).PaddingLeft(1)
+	errorStyle = lipgloss.NewStyle().Foreground(danger).PaddingLeft(1)
+	dateHeaderStyle = lipgloss.NewStyle().Foreground(dim).PaddingLeft(1)
+	pinnedStyle = lipgloss.NewStyle().Foreground(todo)
+	filterPillStyle = lipgloss.NewStyle().Foreground(ok).Bold(true)
+	helpKeyStyle = lipgloss.NewStyle().Foreground(accent).Bold(true).Width(18)
+	helpDescStyle = lipgloss.NewStyle().Foreground(dim)
+	affordanceStyle = lipgloss.NewStyle().Foreground(event).Bold(true)
+	useCountStyle = lipgloss.NewStyle().Foreground(remind)
+	modeStyle = lipgloss.NewStyle().Foreground(dim).Bold(true)
+	detailLabelStyle = lipgloss.NewStyle().Foreground(accent).Bold(true)
+	detailValueStyle = lipgloss.NewStyle().Foreground(muted)
+	checkDoneStyle = lipgloss.NewStyle().Foreground(ok)
+	checkPendingStyle = lipgloss.NewStyle().Foreground(dim)
+	searchPillStyle = lipgloss.NewStyle().Foreground(danger).Bold(true)
+	gutterStyle = lipgloss.NewStyle().Foreground(dim)
+	drawerBorderStyle = lipgloss.NewStyle().Foreground(dim)
+	drawerHintsStyle = lipgloss.NewStyle().Foreground(dim).PaddingLeft(2)
+	drawerPreviewStyle = lipgloss.NewStyle().Foreground(muted).PaddingLeft(2)
+	separatorStyle = lipgloss.NewStyle().Foreground(dim)
+	hintKeyStyle = lipgloss.NewStyle().Foreground(accent).Bold(true)
+	hintDescStyle = lipgloss.NewStyle().Foreground(dim)
+	railHeaderStyle = lipgloss.NewStyle().Bold(true).Foreground(dim)
+	railTagStyle = lipgloss.NewStyle().Foreground(ok)
+	railActiveTagStyle = lipgloss.NewStyle().Foreground(ok).Bold(true)
+	railCountStyle = lipgloss.NewStyle().Foreground(dim)
+	stumbleAgeStyle = lipgloss.NewStyle().Foreground(remind)
+}
diff --git a/internal/tui/tagrail.go b/internal/tui/tagrail.go
index 3ddbe80..ac5097b 100644
--- a/internal/tui/tagrail.go
+++ b/internal/tui/tagrail.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/charmbracelet/lipgloss"
 	"github.com/lerko/nib/internal/db"
 )
 
@@ -78,7 +79,7 @@ func (r tagRailModel) view(focused bool) string {
 
 	headerStyle := railHeaderStyle
 	if focused {
-		headerStyle = headerStyle.Foreground(highlight)
+		headerStyle = headerStyle.Foreground(lipgloss.Color(activeTheme().Accent))
 	}
 	b.WriteString(headerStyle.Render("tags"))
 	b.WriteString("\n")
diff --git a/internal/tui/theme.go b/internal/tui/theme.go
new file mode 100644
index 0000000..6c24cd1
--- /dev/null
+++ b/internal/tui/theme.go
@@ -0,0 +1,90 @@
+package tui
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type Theme struct {
+	Name   string
+	Dark   bool
+	Accent string
+	Dim    string
+	Muted  string
+	Ok     string
+	Todo   string
+	Event  string
+	Remind string
+	Danger string
+}
+
+var themes = []Theme{
+	{Name: "dark", Dark: true, Accent: "#c8942a", Dim: "#504840", Muted: "#8c8070", Ok: "#7aab72", Todo: "#d4a84b", Event: "#6898c8", Remind: "#c8784a", Danger: "#b85858"},
+	{Name: "tinycard", Dark: true, Accent: "#ad8ee6", Dim: "#555a6a", Muted: "#8b90a0", Ok: "#4ade80", Todo: "#fbbf24", Event: "#22d3ee", Remind: "#e8845a", Danger: "#ef4444"},
+	{Name: "catppuccin", Dark: true, Accent: "#cba6f7", Dim: "#6c7086", Muted: "#a6adc8", Ok: "#a6e3a1", Todo: "#f9e2af", Event: "#89b4fa", Remind: "#fab387", Danger: "#f38ba8"},
+	{Name: "nord", Dark: true, Accent: "#88c0d0", Dim: "#4c566a", Muted: "#d8dee9", Ok: "#a3be8c", Todo: "#ebcb8b", Event: "#81a1c1", Remind: "#d08770", Danger: "#bf616a"},
+	{Name: "dracula", Dark: true, Accent: "#bd93f9", Dim: "#6272a4", Muted: "#bfbfbf", Ok: "#50fa7b", Todo: "#f1fa8c", Event: "#8be9fd", Remind: "#ffb86c", Danger: "#ff5555"},
+	{Name: "gruvbox", Dark: true, Accent: "#fabd2f", Dim: "#665c54", Muted: "#a89984", Ok: "#b8bb26", Todo: "#fabd2f", Event: "#83a598", Remind: "#fe8019", Danger: "#fb4934"},
+	{Name: "rosepine", Dark: true, Accent: "#c4a7e7", Dim: "#6e6a86", Muted: "#908caa", Ok: "#a6da95", Todo: "#f6c177", Event: "#31748f", Remind: "#ea9a97", Danger: "#eb6f92"},
+	{Name: "tokyonight", Dark: true, Accent: "#7aa2f7", Dim: "#565f89", Muted: "#a9b1d6", Ok: "#9ece6a", Todo: "#e0af68", Event: "#7aa2f7", Remind: "#ff9e64", Danger: "#f7768e"},
+	{Name: "solarized", Dark: true, Accent: "#268bd2", Dim: "#586e75", Muted: "#657b83", Ok: "#859900", Todo: "#b58900", Event: "#268bd2", Remind: "#cb4b16", Danger: "#dc322f"},
+	{Name: "paper", Dark: false, Accent: "#8a6018", Dim: "#a09080", Muted: "#6a5e50", Ok: "#2a6828", Todo: "#7a5c00", Event: "#245890", Remind: "#984020", Danger: "#882030"},
+	{Name: "catppuccin-latte", Dark: false, Accent: "#8839ef", Dim: "#9ca0b0", Muted: "#6c6f85", Ok: "#40a02b", Todo: "#df8e1d", Event: "#1e66f5", Remind: "#fe640b", Danger: "#d20f39"},
+	{Name: "rosepine-dawn", Dark: false, Accent: "#907aa9", Dim: "#9893a5", Muted: "#797593", Ok: "#56949f", Todo: "#ea9d34", Event: "#286983", Remind: "#d7827e", Danger: "#b4637a"},
+	{Name: "solarized-light", Dark: false, Accent: "#268bd2", Dim: "#93a1a1", Muted: "#586e75", Ok: "#859900", Todo: "#b58900", Event: "#268bd2", Remind: "#cb4b16", Danger: "#dc322f"},
+}
+
+var activeThemeIndex int
+
+func activeTheme() Theme {
+	return themes[activeThemeIndex]
+}
+
+func cycleTheme() Theme {
+	activeThemeIndex = (activeThemeIndex + 1) % len(themes)
+	applyTheme()
+	saveTheme()
+	return themes[activeThemeIndex]
+}
+
+func glamourStyle() string {
+	if themes[activeThemeIndex].Dark {
+		return "dark"
+	}
+	return "light"
+}
+
+func themePath() string {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return ""
+	}
+	return filepath.Join(home, ".nib", "theme")
+}
+
+func loadTheme() {
+	p := themePath()
+	if p == "" {
+		return
+	}
+	data, err := os.ReadFile(p)
+	if err != nil {
+		return
+	}
+	name := strings.TrimSpace(string(data))
+	for i, t := range themes {
+		if t.Name == name {
+			activeThemeIndex = i
+			return
+		}
+	}
+}
+
+func saveTheme() {
+	p := themePath()
+	if p == "" {
+		return
+	}
+	_ = os.WriteFile(p, []byte(themes[activeThemeIndex].Name+"\n"), 0o644)
+}