Colour reference

Poppy Red

#e63946

RGB: rgb(230 57 70)
HSL: 355°, 78%, 56%
OKLCh: 61.2% 0.208 22.2

Poppy Red in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#e63946`
RGB	`rgb(230 57 70)`
RGB legacy	`rgb(230, 57, 70)`
RGB percent	`rgb(90.2% 22.35% 27.45%)`
HSL	`hsl(355.5 77.6% 56.3%)`
HSL legacy	`hsl(355.5, 77.6%, 56.3%)`
HSV / HSB	`hsv(355.5, 75.2%, 90.2%)`
HWB	`hwb(355.5 22.4% 9.8%)`
Nearest name	`crimson (approx.)`
CMYK	`cmyk(0%, 75.2%, 69.6%, 9.8%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(61.222% 0.20817 22.241)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(61.222% 0.19268 0.07879)`
CIE LCh	`lch(52.851% 75.465 28.341)`
CIE Lab	`lab(52.851% 66.419 35.825)`
Display P3	`color(display-p3 0.8312 0.2846 0.298)`
Rec. 2020	`color(rec2020 0.7145 0.2782 0.2359)`
srgb-linear	`color(srgb-linear 0.7913 0.0409 0.0612)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.352 0.2019 0.0784)`

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

GLSL vec3 — sRGB	`vec3(0.902, 0.224, 0.275)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.791, 0.041, 0.061)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.902, 0.224, 0.275, 1.0)`
GLSL vec4 — linear	`vec4(0.791, 0.041, 0.061, 1.0)`
GLSL ivec3	`ivec3(230, 57, 70)`
HLSL float3 — sRGB	`float3(0.902, 0.224, 0.275)`
HLSL float3 — linear	`float3(0.791, 0.041, 0.061)`
HLSL float4 — sRGB	`float4(0.902, 0.224, 0.275, 1.0)`
HLSL half4 — sRGB	`half4(0.902, 0.224, 0.275, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.902, 0.224, 0.275)`
WGSL vec4f — sRGB	`vec4f(0.902, 0.224, 0.275, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.791, 0.041, 0.061)`

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

Unity Color	`new Color(0.902f, 0.224f, 0.275f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(230, 57, 70, 255)`
Unreal FLinearColor	`FLinearColor(0.7913f, 0.0409f, 0.0612f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(230, 57, 70, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.902, 0.224, 0.275, 1)`
Flutter Color	`Color(0xFFE63946)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(230, 57, 70)`
SwiftUI Color	`Color(red: 0.902, green: 0.224, blue: 0.275)`
UIKit UIColor	`UIColor(red: 0.902, green: 0.224, blue: 0.275, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0xE63946`
0x hex (ARGB)	`0xFFE63946`
Array 0–1	`[0.902, 0.224, 0.275]`
Array 0–255	`[230, 57, 70]`
Decimal integer	`15087942`

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
Poppy Red on white	4.17:1	AA Large	Lc 67	Headings and large text
Poppy Red on black	5.04:1	AA	Lc 34	Non-text elements only

Poppy Red text on a white background

Poppy Red text on a black background

White text on Poppy Red

Black text on Poppy Red

Tonal scale

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

50#ffefed
100#ffe2df
200#ffc9c5
300#ffa5a2
400#ff7071
500#ef434d
600#cd2336
700#ad0023
800#900013
900#74000b
950#480003

Tints and shades

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

Tint 1#ef6365
Tint 2#f68583
Tint 3#fca5a1
Tint 4#ffc3c0
Tint 5#ffe1df
Shade 1#b42b35
Shade 2#851d25
Shade 3#591015
Shade 4#300507
Shade 5#0c0101

Colours that work with Poppy Red

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

#0099a4
#06a000
#397afe
#da3b90
#d35b00

Closest CSS names

crimsonΔEok 0.044
redΔEok 0.059
indianredΔEok 0.064
orangeredΔEok 0.073
tomatoΔEok 0.092
chocolateΔEok 0.104