Colour reference

Emerald 500

#10b981

RGB: rgb(16 185 129)
HSL: 160°, 84%, 39%
OKLCh: 69.6% 0.149 162.5

Emerald 500 in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#10b981`
RGB	`rgb(16 185 129)`
RGB legacy	`rgb(16, 185, 129)`
RGB percent	`rgb(6.27% 72.55% 50.59%)`
HSL	`hsl(160.1 84.1% 39.4%)`
HSL legacy	`hsl(160.1, 84.1%, 39.4%)`
HSV / HSB	`hsv(160.1, 91.4%, 72.5%)`
HWB	`hwb(160.1 6.3% 27.5%)`
Nearest name	`mediumseagreen (approx.)`
CMYK	`cmyk(91.4%, 0%, 30.3%, 27.5%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(69.587% 0.14907 162.48)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(69.587% -0.14216 0.04488)`
CIE LCh	`lch(66.692% 53.462 161.392)`
CIE Lab	`lab(66.692% -50.668 17.059)`
Display P3	`color(display-p3 0.3325 0.7147 0.5221)`
Rec. 2020	`color(rec2020 0.3992 0.6674 0.4784)`
srgb-linear	`color(srgb-linear 0.0052 0.4851 0.2195)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.2152 0.3639 0.2666)`

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

GLSL vec3 — sRGB	`vec3(0.063, 0.725, 0.506)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.005, 0.485, 0.22)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.063, 0.725, 0.506, 1.0)`
GLSL vec4 — linear	`vec4(0.005, 0.485, 0.22, 1.0)`
GLSL ivec3	`ivec3(16, 185, 129)`
HLSL float3 — sRGB	`float3(0.063, 0.725, 0.506)`
HLSL float3 — linear	`float3(0.005, 0.485, 0.22)`
HLSL float4 — sRGB	`float4(0.063, 0.725, 0.506, 1.0)`
HLSL half4 — sRGB	`half4(0.063, 0.725, 0.506, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.063, 0.725, 0.506)`
WGSL vec4f — sRGB	`vec4f(0.063, 0.725, 0.506, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.005, 0.485, 0.22)`

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

Unity Color	`new Color(0.063f, 0.725f, 0.506f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(16, 185, 129, 255)`
Unreal FLinearColor	`FLinearColor(0.0052f, 0.4851f, 0.2195f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(16, 185, 129, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.063, 0.725, 0.506, 1)`
Flutter Color	`Color(0xFF10B981)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(16, 185, 129)`
SwiftUI Color	`Color(red: 0.063, green: 0.725, blue: 0.506)`
UIKit UIColor	`UIColor(red: 0.063, green: 0.725, blue: 0.506, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x10B981`
0x hex (ARGB)	`0xFF10B981`
Array 0–1	`[0.063, 0.725, 0.506]`
Array 0–255	`[16, 185, 129]`
Decimal integer	`1096065`

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
Emerald 500 on white	2.54:1	Fail	Lc 49	Large headings only
Emerald 500 on black	8.28:1	AAA	Lc 53	Large headings only

Emerald 500 text on a white background

Emerald 500 text on a black background

White text on Emerald 500

Black text on Emerald 500

Tonal scale

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

50#cfffea
100#a2ffd6
200#89f6c4
300#67e1ac
400#37c58e
500#00a670
600#008a57
700#007045
800#005935
900#004728
950#002a14

Tints and shades

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

Tint 1#56c595
Tint 2#7ed1aa
Tint 3#a1ddbf
Tint 4#c1e8d4
Tint 5#e0f4e9
Shade 1#0a9064
Shade 2#056a48
Shade 3#02462e
Shade 4#012416
Shade 5#000703

Colours that work with Emerald 500

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

#db74b6
#918ff6
#e87a4c
#78b047
#00b7b4

Closest CSS names

mediumseagreenΔEok 0.023
lightseagreenΔEok 0.069
mediumaquamarineΔEok 0.091
darkseagreenΔEok 0.095
cadetblueΔEok 0.110
limegreenΔEok 0.111