Colour reference

GitHub Dark

#0d1117

GitHub’s dark mode canvas colour.

RGB: rgb(13 17 23)
HSL: 216°, 28%, 7%
OKLCh: 17.6% 0.014 258.4

GitHub Dark in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#0d1117`
RGB	`rgb(13 17 23)`
RGB legacy	`rgb(13, 17, 23)`
RGB percent	`rgb(5.1% 6.67% 9.02%)`
HSL	`hsl(216 27.8% 7.1%)`
HSL legacy	`hsl(216, 27.8%, 7.1%)`
HSV / HSB	`hsv(216, 43.5%, 9%)`
HWB	`hwb(216 5.1% 91%)`
Nearest name	`midnightblue (approx.)`
CMYK	`cmyk(43.5%, 26.1%, 0%, 91%)`Naive conversion. Real print work needs an ICC profile.

Perceptual & wide gamutModern CSS colour spaces for uniform scales and P3 displays.

OKLCh	`oklch(17.628% 0.01402 258.357)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(17.628% -0.00283 -0.01373)`
CIE LCh	`lch(4.908% 4.239 264.565)`
CIE Lab	`lab(4.908% -0.401 -4.22)`
Display P3	`color(display-p3 0.054 0.0662 0.0881)`
Rec. 2020	`color(rec2020 0.0213 0.0249 0.037)`
srgb-linear	`color(srgb-linear 0.004 0.0056 0.0086)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.0052 0.0055 0.0089)`

ShadersGLSL, HLSL and WGSL vectors in both encoded and linear form.

GLSL vec3 — sRGB	`vec3(0.051, 0.067, 0.09)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.004, 0.006, 0.009)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.051, 0.067, 0.09, 1.0)`
GLSL vec4 — linear	`vec4(0.004, 0.006, 0.009, 1.0)`
GLSL ivec3	`ivec3(13, 17, 23)`
HLSL float3 — sRGB	`float3(0.051, 0.067, 0.09)`
HLSL float3 — linear	`float3(0.004, 0.006, 0.009)`
HLSL float4 — sRGB	`float4(0.051, 0.067, 0.09, 1.0)`
HLSL half4 — sRGB	`half4(0.051, 0.067, 0.09, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.051, 0.067, 0.09)`
WGSL vec4f — sRGB	`vec4f(0.051, 0.067, 0.09, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.004, 0.006, 0.009)`

Engines & appsConstructors for Unity, Unreal, Godot, Flutter, SwiftUI and Android.

Unity Color	`new Color(0.051f, 0.067f, 0.09f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(13, 17, 23, 255)`
Unreal FLinearColor	`FLinearColor(0.004f, 0.0056f, 0.0086f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(13, 17, 23, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.051, 0.067, 0.09, 1)`
Flutter Color	`Color(0xFF0D1117)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(13, 17, 23)`
SwiftUI Color	`Color(red: 0.051, green: 0.067, blue: 0.09)`
UIKit UIColor	`UIColor(red: 0.051, green: 0.067, blue: 0.09, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x0D1117`
0x hex (ARGB)	`0xFF0D1117`
Array 0–1	`[0.051, 0.067, 0.09]`
Array 0–255	`[13, 17, 23]`
Decimal integer	`856343`

Contrast and accessibility

WCAG 2 ratios are what audits and legislation reference. APCA is shown alongside because WCAG 2 is known to misjudge mid-tone backgrounds, and it is the basis of the WCAG 3 draft.

Pairing	WCAG 2 ratio	Level	APCA	Suitable for
GitHub Dark on white	18.92:1	AAA	Lc 105	Body text at any size
GitHub Dark on black	1.11:1	Fail	Lc 0	Not usable for text

GitHub Dark text on a white background

GitHub Dark text on a black background

White text on GitHub Dark

Black text on GitHub Dark

Tonal scale

Hue held fixed while lightness walks OKLCh, ready to use as a design system ramp.

50#f3f8ff
100#e9eef5
200#d8dde4
300#c1c6ce
400#a4aab2
500#868c94
600#6d727a
700#565b62
800#44484e
900#34383e
950#1d1f24

Tints and shades

Mixed perceptually toward white and black, so the steps feel evenly spaced.

Tint 1#2e3137
Tint 2#52565b
Tint 3#7a7d81
Tint 4#a4a6a9
Tint 5#d1d2d3
Shade 1#080b0f
Shade 2#040508
Shade 3#020204
Shade 4#000101
Shade 5#000000

Colours that work with GitHub Dark

Complementary, triadic and analogous partners, rotated in OKLCh so they keep the same apparent brightness.

#14100a
#170e0e
#0e120c
#0a1216
#101017

Closest CSS names

midnightblueΔEok 0.172
blackΔEok 0.177
navyΔEok 0.198
darkblueΔEok 0.216
darkslategrayΔEok 0.229
indigoΔEok 0.235