Table of Contents

Themes

Applying a theme

Plt.Create()
    .WithTheme(Theme.Dracula)
    .Plot(x, y, s => s.Label = "Data")
    .WithLegend()
    .Save("dracula.svg");

26 built-in themes

Light themes

Theme Usage Style
Theme.Default General purpose White bg, tab10 colors
Theme.Seaborn Statistical Light gray bg, subtle grid
Theme.Ggplot R ggplot2 style Gray bg, white grid
Theme.FiveThirtyEight Journalism Bold, no spines
Theme.Bmh Academic Teal/salmon cycle
Theme.Solarize Solarized palette Cream bg
Theme.Grayscale Print-friendly Grayscale-only series palette (no hues)
Theme.Paper Academic papers Serif font, size 11, no grid
Theme.Presentation Slides Bold weight, size 16
Theme.Poster Conference posters Bold weight, size 20, thicker grid (1.5 linewidth)
Theme.GitHub GitHub style GitHub brand palette (#0366D6, #28A745, #6F42C1, #D73A49, #E36209), subtle #E1E4E8 grid
Theme.Minimal Tufte-inspired No grid, size 11
Theme.Retro Vintage Warm yellows/browns
Theme.MatplotlibClassic Pre-2.0 matplotlib bgrcmyk cycle
Theme.MatplotlibV2 Modern matplotlib tab10, soft-black

Dark themes

Theme Usage Style
Theme.Dark General dark mode Dark bg, bright colors
Theme.Cyberpunk Neon on dark Green neon on purple/black
Theme.Nord Nord palette Arctic blues/greens
Theme.Dracula Dracula palette Purple/pink/cyan
Theme.Monokai Editor classic Monokai colors
Theme.Catppuccin Warm pastels Pastel on dark
Theme.Gruvbox Retro warm Gruvbox tones
Theme.OneDark Atom editor Subtle muted
Theme.Neon Bright neon Neon green on black

Accessibility themes

Theme Usage
Theme.ColorBlindSafe Okabe-Ito palette
Theme.HighContrast WCAG AAA

Theme comparison

string[] themes = ["Default", "Dark", "Nord", "Dracula", "Cyberpunk",
                   "Monokai", "Catppuccin", "Gruvbox", "OneDark", "Neon"];

foreach (var name in themes)
{
    var theme = typeof(Theme).GetProperty(name)!.GetValue(null) as Theme;
    Plt.Create()
        .WithTheme(theme!)
        .WithTitle(name)
        .Plot(x, y, s => s.Label = "sin(x)")
        .WithLegend()
        .Save($"theme_{name}.svg");
}

Theme comparison

Custom theme with ThemeBuilder

Build your own theme from scratch or derive from an existing one:

var custom = Theme.CreateFrom(Theme.Dark)
    .WithBackground(Color.FromHex("#1e1e2e"))
    .WithForegroundText(Colors.White)
    .WithAxesBackground(Color.FromHex("#282a36"))
    .WithCycleColors(Colors.Cyan, Colors.Pink, Colors.Green, Colors.Yellow)
    .WithFont(f => f with { Family = "JetBrains Mono", Size = 11 })
    .WithGrid(g => g with
    {
        Color = Color.FromHex("#44475a"),
        LineStyle = LineStyle.Dotted,
        Alpha = 0.5
    })
    .Build();

Plt.Create()
    .WithTheme(custom)
    .WithTitle("Custom Theme")
    .Plot(x, y1, s => s.Label = "Series 1")
    .Plot(x, y2, s => s.Label = "Series 2")
    .WithLegend()
    .Save("custom_theme.svg");

Custom PropCycler

Control color + line style cycling for multi-series plots:

var cycler = new PropCyclerBuilder()
    .WithColors(Colors.Cyan, Colors.Magenta, Colors.Gold, Colors.LimeGreen)
    .WithLineStyles(LineStyle.Solid, LineStyle.Dashed, LineStyle.DashDot, LineStyle.Dotted)
    .Build();

var theme = Theme.CreateFrom(Theme.Dark)
    .WithPropCycler(cycler)
    .Build();

Theme with 3D pane colors

var theme3d = Theme.CreateFrom(Theme.Dark)
    .WithBackground(Color.FromHex("#1a1a2e"))
    .WithForegroundText(Colors.White)
    .Build();

Plt.Create()
    .WithTheme(theme3d)
    .AddSubPlot(1, 1, 1, ax => ax
        .Surface(x, y, z)
        .WithPane3D(p => p with
        {
            FloorColor = Color.FromHex("#2A2A2A"),
            LeftWallColor = Color.FromHex("#222222"),
            RightWallColor = Color.FromHex("#333333"),
            Alpha = 0.8,
        })
        .WithCamera(elevation: 30, azimuth: -50))
    .Save("themed_3d.svg");

Theme background shortcut

// Quick way to set just the background
Plt.Create()
    .WithBackground(Color.FromHex("#f5f5dc"))  // beige
    .WithTheme(Theme.Paper)
    .Plot(x, y)
    .Save("paper_bg.svg");

Fluent API reference

Method Description
.WithTheme(Theme preset) Apply a built-in or custom theme
.WithBackground(Color) Override figure background
Theme.CreateFrom(base) Start a ThemeBuilder from existing theme
.WithForegroundText(Color) Text/foreground color
.WithAxesBackground(Color) Axes area background
.WithCycleColors(params Color[]) Color cycle for series
.WithFont(Func<Font, Font>) Default font (family, size, weight)
.WithGrid(Func<GridStyle, GridStyle>) Grid appearance
.WithPropCycler(PropCycler) Multi-property cycler
.Build() Return customized Theme
Edit this page