CSS named colour

Dark Slate Gray

#2f4f4f

A CSS named colour: darkslategray is valid anywhere a colour is expected.

RGB: rgb(47 79 79)
HSL: 180°, 25%, 25%
OKLCh: 40.3% 0.038 195.8

Dark Slate Gray in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#2f4f4f`
RGB	`rgb(47 79 79)`
RGB legacy	`rgb(47, 79, 79)`
RGB percent	`rgb(18.43% 30.98% 30.98%)`
HSL	`hsl(180 25.4% 24.7%)`
HSL legacy	`hsl(180, 25.4%, 24.7%)`
HSV / HSB	`hsv(180, 40.5%, 31%)`
HWB	`hwb(180 18.4% 69%)`
Nearest name	`darkslategray`
CMYK	`cmyk(40.5%, 0%, 0%, 69%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(40.296% 0.03772 195.758)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(40.296% -0.03631 -0.01024)`
CIE LCh	`lch(31.141% 12.877 197.8)`
CIE Lab	`lab(31.141% -12.261 -3.937)`
Display P3	`color(display-p3 0.2129 0.3066 0.3081)`
Rec. 2020	`color(rec2020 0.1783 0.2429 0.2482)`
srgb-linear	`color(srgb-linear 0.0284 0.0782 0.0782)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.0538 0.0676 0.0842)`

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

GLSL vec3 — sRGB	`vec3(0.184, 0.31, 0.31)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.028, 0.078, 0.078)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.184, 0.31, 0.31, 1.0)`
GLSL vec4 — linear	`vec4(0.028, 0.078, 0.078, 1.0)`
GLSL ivec3	`ivec3(47, 79, 79)`
HLSL float3 — sRGB	`float3(0.184, 0.31, 0.31)`
HLSL float3 — linear	`float3(0.028, 0.078, 0.078)`
HLSL float4 — sRGB	`float4(0.184, 0.31, 0.31, 1.0)`
HLSL half4 — sRGB	`half4(0.184, 0.31, 0.31, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.184, 0.31, 0.31)`
WGSL vec4f — sRGB	`vec4f(0.184, 0.31, 0.31, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.028, 0.078, 0.078)`

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

Unity Color	`new Color(0.184f, 0.31f, 0.31f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(47, 79, 79, 255)`
Unreal FLinearColor	`FLinearColor(0.0284f, 0.0782f, 0.0782f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(47, 79, 79, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.184, 0.31, 0.31, 1)`
Flutter Color	`Color(0xFF2F4F4F)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(47, 79, 79)`
SwiftUI Color	`Color(red: 0.184, green: 0.31, blue: 0.31)`
UIKit UIColor	`UIColor(red: 0.184, green: 0.31, blue: 0.31, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x2F4F4F`
0x hex (ARGB)	`0xFF2F4F4F`
Array 0–1	`[0.184, 0.31, 0.31]`
Array 0–255	`[47, 79, 79]`
Decimal integer	`3100495`

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
Dark Slate Gray on white	8.93:1	AAA	Lc 90	Body text at any size
Dark Slate Gray on black	2.35:1	Fail	Lc 12	Not usable for text

Dark Slate Gray text on a white background

Dark Slate Gray text on a black background

White text on Dark Slate Gray

Black text on Dark Slate Gray

Tonal scale

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

50#e3fefd
100#d8f4f4
200#c5e3e3
300#adcdcd
400#8fb1b1
500#719393
600#597978
700#446161
800#334d4d
900#253d3d
950#102323

Tints and shades

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

Tint 1#4f6a6a
Tint 2#708686
Tint 3#92a3a3
Tint 4#b5c1c0
Tint 5#dadfdf
Shade 1#233c3c
Shade 2#172a2a
Shade 3#0c1919
Shade 4#030a0a
Shade 5#000101

Colours that work with Dark Slate Gray

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

#5b4042
#514257
#544631
#354f44
#324d58

Closest CSS names

darkslategrayexact match
dimgrayΔEok 0.124
darkolivegreenΔEok 0.125
darkslateblueΔEok 0.131
darkgreenΔEok 0.134
tealΔEok 0.151