CSS named colour

Sea Shell

#fff5ee

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

RGB: rgb(255 245 238)
HSL: 25°, 100%, 97%
OKLCh: 97.6% 0.014 57.6

Sea Shell in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#fff5ee`
RGB	`rgb(255 245 238)`
RGB legacy	`rgb(255, 245, 238)`
RGB percent	`rgb(100% 96.08% 93.33%)`
HSL	`hsl(24.7 100% 96.7%)`
HSL legacy	`hsl(24.7, 100%, 96.7%)`
HSV / HSB	`hsv(24.7, 6.7%, 100%)`
HWB	`hwb(24.7 93.3% 0%)`
Nearest name	`seashell`
CMYK	`cmyk(0%, 3.9%, 6.7%, 0%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(97.602% 0.01425 57.592)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(97.602% 0.00764 0.01203)`
CIE LCh	`lch(97.183% 5.309 60.821)`
CIE Lab	`lab(97.183% 2.588 4.635)`
Display P3	`color(display-p3 0.9932 0.9621 0.9365)`
Rec. 2020	`color(rec2020 0.9826 0.9587 0.9292)`
srgb-linear	`color(srgb-linear 1 0.9131 0.855)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.8932 0.9274 0.9409)`

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

GLSL vec3 — sRGB	`vec3(1.0, 0.961, 0.933)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(1.0, 0.913, 0.855)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(1.0, 0.961, 0.933, 1.0)`
GLSL vec4 — linear	`vec4(1.0, 0.913, 0.855, 1.0)`
GLSL ivec3	`ivec3(255, 245, 238)`
HLSL float3 — sRGB	`float3(1.0, 0.961, 0.933)`
HLSL float3 — linear	`float3(1.0, 0.913, 0.855)`
HLSL float4 — sRGB	`float4(1.0, 0.961, 0.933, 1.0)`
HLSL half4 — sRGB	`half4(1.0, 0.961, 0.933, 1.0)`
WGSL vec3f — sRGB	`vec3f(1.0, 0.961, 0.933)`
WGSL vec4f — sRGB	`vec4f(1.0, 0.961, 0.933, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(1.0, 0.913, 0.855)`

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

Unity Color	`new Color(1.0f, 0.961f, 0.933f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(255, 245, 238, 255)`
Unreal FLinearColor	`FLinearColor(1.0f, 0.9131f, 0.855f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(255, 245, 238, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(1, 0.961, 0.933, 1)`
Flutter Color	`Color(0xFFFFF5EE)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(255, 245, 238)`
SwiftUI Color	`Color(red: 1, green: 0.961, blue: 0.933)`
UIKit UIColor	`UIColor(red: 1, green: 0.961, blue: 0.933, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0xFFF5EE`
0x hex (ARGB)	`0xFFFFF5EE`
Array 0–1	`[1, 0.961, 0.933]`
Array 0–255	`[255, 245, 238]`
Decimal integer	`16774638`

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
Sea Shell on white	1.07:1	Fail	Lc 0	Not usable for text
Sea Shell on black	19.55:1	AAA	Lc 102	Body text at any size

Sea Shell text on a white background

Sea Shell text on a black background

White text on Sea Shell

Black text on Sea Shell

Tonal scale

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

50#fdf6f1
100#f4ece6
200#e3dbd5
300#ccc4be
400#b0a7a1
500#928983
600#78706a
700#615954
800#4d4641
900#3d3732
950#231e1b

Tints and shades

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

Tint 1#fff7f1
Tint 2#fff8f4
Tint 3#fffaf6
Tint 4#fffcf9
Tint 5#fffdfc
Shade 1#c8c0bb
Shade 2#948e8a
Shade 3#635f5c
Shade 4#363432
Shade 5#0f0e0d

Colours that work with Sea Shell

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

#eff9ff
#eefaf7
#f8f5ff
#fff4f2
#fbf7ed

Closest CSS names

seashellexact match
oldlaceΔEok 0.011
floralwhiteΔEok 0.012
whitesmokeΔEok 0.015
linenΔEok 0.016
snowΔEok 0.017