#51BCE8#51BCE8

#51BCE8 is a light, moderate cyan. Relative luminance 0.435; OKLCH L 75.1% C 0.116 H 228.5°. Best body text is #000000 at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#51BCE8
RGB	rgb(81, 188, 232)
HSL	hsl(197, 77%, 61%)
HSV	hsv(197, 65%, 91%)
CMYK	cmyk(65.1%, 19%, 0%, 9%)
CIE-LAB	lab(71.92, -17.41, -31.00)
CIE-LCH	lch(71.92, 35.55, 240.68°)
OKLab	oklab(75.06% -0.0768 -0.0867)
OKLCH	oklch(75.06% 0.116 228.5)
XYZ	xyz(35.9363, 43.5381, 82.8381)
Luminance	0.4354 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCE8 #E87D51

analogous

#51E8C8 #51BCE8 #5171E8

triadic

#51BCE8 #E851BC #BCE851

tetradic

#51BCE8 #C851E8 #E87D51 #71E851

square

#51BCE8 #C851E8 #E87D51 #71E851

split-complementary

#51BCE8 #E85171 #E8C851

monochromatic

#167EA8 #1DA6DE #51BCE8 #87D1EF #BDE6F6

Accessibility & contrast

On white

2.16

#51BCE8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.71

#51BCE8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCE8

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCE8	#FFFFFF	#000000	##000000
##51BCE8	1.00	2.16	9.71	9.71
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.71	21.00	1.00	1.00
##000000	9.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B9EA

Deuteranopia (green-blind)

#90AAE7

Tritanopia (blue-blind)

#00C8CA

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bce8;
/* rgb */ color: rgb(81, 188, 232);
/* oklch */ color: oklch(75.1% 0.116 228.5);

Tailwind

colors: {
  custom: {
    50: '#91d0ef',
    500: '#51bce8',
    950: '#000000',
  },
}

SCSS

$custom: #51bce8;
$custom-light: #91d0ef;
$custom-dark: #000000;

JSON

{
  "hex": "#51bce8",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 232
  },
  "hsl": {
    "h": 197.483,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.75062,
    "c": 0.11585,
    "h": 228.5
  },
  "luminance": 0.43542
}

Semantic roles & 50–950 ramp

primary

#51BCE8

secondary

#E7BFAE

accent

#480DD9

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCE8

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →