#51BEE8#51BEE8

#51BEE8 is a light, moderate cyan. Relative luminance 0.444; OKLCH L 75.5% C 0.115 H 226.9°. Best body text is #000000 at 9.88:1 contrast (WCAG AA passes).

Color values

HEX	#51BEE8
RGB	rgb(81, 190, 232)
HSL	hsl(197, 77%, 61%)
HSV	hsv(197, 65%, 91%)
CMYK	cmyk(65.1%, 18.1%, 0%, 9%)
CIE-LAB	lab(72.49, -18.45, -30.11)
CIE-LCH	lch(72.49, 35.31, 238.50°)
OKLab	oklab(75.52% -0.0788 -0.0842)
OKLCH	oklch(75.52% 0.115 226.9)
XYZ	xyz(36.3665, 44.3986, 82.9815)
Luminance	0.4440 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BEE8 #E87B51

analogous

#51E8C7 #51BEE8 #5173E8

triadic

#51BEE8 #E851BE #BEE851

tetradic

#51BEE8 #C751E8 #E87B51 #73E851

square

#51BEE8 #C751E8 #E87B51 #73E851

split-complementary

#51BEE8 #E85173 #E8C751

monochromatic

#1680A8 #1DA9DE #51BEE8 #87D2EF #BDE6F6

Accessibility & contrast

On white

2.13

#51BEE8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.88

#51BEE8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BEE8

9.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BEE8	#FFFFFF	#000000	##000000
##51BEE8	1.00	2.13	9.88	9.88
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.88	21.00	1.00	1.00
##000000	9.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8BBEA

Deuteranopia (green-blind)

#92ABE7

Tritanopia (blue-blind)

#00CACC

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51bee8;
/* rgb */ color: rgb(81, 190, 232);
/* oklch */ color: oklch(75.5% 0.115 226.9);

Tailwind

colors: {
  custom: {
    50: '#91d1ef',
    500: '#51bee8',
    950: '#000000',
  },
}

SCSS

$custom: #51bee8;
$custom-light: #91d1ef;
$custom-dark: #000000;

JSON

{
  "hex": "#51bee8",
  "rgb": {
    "r": 81,
    "g": 190,
    "b": 232
  },
  "hsl": {
    "h": 196.689,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.75522,
    "c": 0.11533,
    "h": 226.9
  },
  "luminance": 0.44402
}

Semantic roles & 50–950 ramp

primary

#51BEE8

secondary

#E7BEAE

accent

#450DD9

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BEE8

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

Preview Lab → · Contrast checker → · Palette generator →