CSS named colour

Deep Sky Blue

#00bfff

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

RGB: rgb(0 191 255)
HSL: 195°, 100%, 50%
OKLCh: 75.5% 0.153 231.6

Deep Sky Blue in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#00bfff`
RGB	`rgb(0 191 255)`
RGB legacy	`rgb(0, 191, 255)`
RGB percent	`rgb(0% 74.9% 100%)`
HSL	`hsl(195.1 100% 50%)`
HSL legacy	`hsl(195.1, 100%, 50%)`
HSV / HSB	`hsv(195.1, 100%, 100%)`
HWB	`hwb(195.1 0% 0%)`
Nearest name	`deepskyblue`
CMYK	`cmyk(100%, 25.1%, 0%, 0%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(75.535% 0.15342 231.639)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(75.535% -0.09522 -0.1203)`
CIE LCh	`lch(71.833% 49.765 241.075)`
CIE Lab	`lab(71.833% -24.07 -43.557)`
Display P3	`color(display-p3 0.3363 0.7378 0.9769)`
Rec. 2020	`color(rec2020 0.451 0.6985 0.9706)`
srgb-linear	`color(srgb-linear 0 0.521 1)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.3668 0.4448 1.0126)`

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

GLSL vec3 — sRGB	`vec3(0.0, 0.749, 1.0)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.0, 0.521, 1.0)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.0, 0.749, 1.0, 1.0)`
GLSL vec4 — linear	`vec4(0.0, 0.521, 1.0, 1.0)`
GLSL ivec3	`ivec3(0, 191, 255)`
HLSL float3 — sRGB	`float3(0.0, 0.749, 1.0)`
HLSL float3 — linear	`float3(0.0, 0.521, 1.0)`
HLSL float4 — sRGB	`float4(0.0, 0.749, 1.0, 1.0)`
HLSL half4 — sRGB	`half4(0.0, 0.749, 1.0, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.0, 0.749, 1.0)`
WGSL vec4f — sRGB	`vec4f(0.0, 0.749, 1.0, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.0, 0.521, 1.0)`

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

Unity Color	`new Color(0.0f, 0.749f, 1.0f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(0, 191, 255, 255)`
Unreal FLinearColor	`FLinearColor(0.0f, 0.521f, 1.0f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(0, 191, 255, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0, 0.749, 1, 1)`
Flutter Color	`Color(0xFF00BFFF)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(0, 191, 255)`
SwiftUI Color	`Color(red: 0, green: 0.749, blue: 1)`
UIKit UIColor	`UIColor(red: 0, green: 0.749, blue: 1, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x00BFFF`
0x hex (ARGB)	`0xFF00BFFF`
Array 0–1	`[0, 0.749, 1]`
Array 0–255	`[0, 191, 255]`
Decimal integer	`49151`

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
Deep Sky Blue on white	2.12:1	Fail	Lc 41	Non-text elements only
Deep Sky Blue on black	9.90:1	AAA	Lc 61	Headings and large text

Deep Sky Blue text on a white background

Deep Sky Blue text on a black background

White text on Deep Sky Blue

Black text on Deep Sky Blue

Tonal scale

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

50#defdff
100#c8f5ff
200#9fe8ff
300#5bd4ff
400#0ab8f5
500#0099d7
600#007db2
700#006491
800#005076
900#003f5f
950#00243b

Tints and shades

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

Tint 1#57cbff
Tint 2#80d6ff
Tint 3#a3e1ff
Tint 4#c3ebff
Tint 5#e1f5ff
Shade 1#0095c8
Shade 2#006d94
Shade 3#004863
Shade 4#002636
Shade 5#00080f

Colours that work with Deep Sky Blue

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

#fa904a
#f783ba
#b3b82c
#00cad7
#7aaeff

Closest CSS names

deepskyblueexact match
lightskyblueΔEok 0.089
darkturquoiseΔEok 0.090
skyblueΔEok 0.094
mediumturquoiseΔEok 0.104
cornflowerblueΔEok 0.111