CSS named colour

Crimson

#dc143c

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

RGB: rgb(220 20 60)
HSL: 348°, 83%, 47%
OKLCh: 57.1% 0.222 20.1

Crimson in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#dc143c`
RGB	`rgb(220 20 60)`
RGB legacy	`rgb(220, 20, 60)`
RGB percent	`rgb(86.27% 7.84% 23.53%)`
HSL	`hsl(348 83.3% 47.1%)`
HSL legacy	`hsl(348, 83.3%, 47.1%)`
HSV / HSB	`hsv(348, 90.9%, 86.3%)`
HWB	`hwb(348 7.8% 13.7%)`
Nearest name	`crimson`
CMYK	`cmyk(0%, 90.9%, 72.7%, 13.7%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(57.119% 0.22194 20.087)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(57.119% 0.20844 0.07623)`
CIE LCh	`lch(47.879% 79.619 26.464)`
CIE Lab	`lab(47.879% 71.276 35.482)`
Display P3	`color(display-p3 0.7917 0.1915 0.2574)`
Rec. 2020	`color(rec2020 0.6707 0.2021 0.1934)`
srgb-linear	`color(srgb-linear 0.7157 0.007 0.0452)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.3058 0.1604 0.0576)`

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

GLSL vec3 — sRGB	`vec3(0.863, 0.078, 0.235)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.716, 0.007, 0.045)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.863, 0.078, 0.235, 1.0)`
GLSL vec4 — linear	`vec4(0.716, 0.007, 0.045, 1.0)`
GLSL ivec3	`ivec3(220, 20, 60)`
HLSL float3 — sRGB	`float3(0.863, 0.078, 0.235)`
HLSL float3 — linear	`float3(0.716, 0.007, 0.045)`
HLSL float4 — sRGB	`float4(0.863, 0.078, 0.235, 1.0)`
HLSL half4 — sRGB	`half4(0.863, 0.078, 0.235, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.863, 0.078, 0.235)`
WGSL vec4f — sRGB	`vec4f(0.863, 0.078, 0.235, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.716, 0.007, 0.045)`

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

Unity Color	`new Color(0.863f, 0.078f, 0.235f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(220, 20, 60, 255)`
Unreal FLinearColor	`FLinearColor(0.7157f, 0.007f, 0.0452f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(220, 20, 60, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.863, 0.078, 0.235, 1)`
Flutter Color	`Color(0xFFDC143C)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(220, 20, 60)`
SwiftUI Color	`Color(red: 0.863, green: 0.078, blue: 0.235)`
UIKit UIColor	`UIColor(red: 0.863, green: 0.078, blue: 0.235, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0xDC143C`
0x hex (ARGB)	`0xFFDC143C`
Array 0–1	`[0.863, 0.078, 0.235]`
Array 0–255	`[220, 20, 60]`
Decimal integer	`14423100`

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
Crimson on white	4.99:1	AA	Lc 72	Headings and large text
Crimson on black	4.21:1	AA Large	Lc 29	Not usable for text

Crimson text on a white background

Crimson text on a black background

White text on Crimson

Black text on Crimson

Tonal scale

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

50#ffefee
100#ffe1e0
200#ffc9c7
300#ffa5a5
400#ff6f77
500#f4384f
600#d20f38
700#b10025
800#90001a
900#740011
950#480005

Tints and shades

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

Tint 1#e7525c
Tint 2#f1797c
Tint 3#f89c9b
Tint 4#fdbdbc
Tint 5#ffdedd
Shade 1#ac0d2d
Shade 2#7f071f
Shade 3#540311
Shade 4#2d0106
Shade 5#0b0001

Colours that work with Crimson

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

#008b93
#009300
#126df7
#ce1f89
#c44e00

Closest CSS names

crimsonexact match
redΔEok 0.077
firebrickΔEok 0.089
indianredΔEok 0.090
orangeredΔEok 0.108
brownΔEok 0.111