#51BCEB#51BCEB

#51BCEB is a light, moderate cyan. Relative luminance 0.437; OKLCH L 75.2% C 0.118 H 230.2°. Best body text is #000000 at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#51BCEB
RGB	rgb(81, 188, 235)
HSL	hsl(198, 79%, 62%)
HSV	hsv(198, 66%, 92%)
CMYK	cmyk(65.5%, 20%, 0%, 7.8%)
CIE-LAB	lab(72.03, -16.47, -32.44)
CIE-LCH	lch(72.03, 36.39, 243.08°)
OKLab	oklab(75.19% -0.0758 -0.0908)
OKLCH	oklch(75.19% 0.118 230.2)
XYZ	xyz(36.3660, 43.7100, 85.1015)
Luminance	0.4371 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCEB #EB8051

analogous

#51EBCD #51BCEB #516FEB

triadic

#51BCEB #EB51BC #BCEB51

tetradic

#51BCEB #CD51EB #EB8051 #6FEB51

square

#51BCEB #CD51EB #EB8051 #6FEB51

split-complementary

#51BCEB #EB516F #EBCD51

monochromatic

#147FAE #1AA7E5 #51BCEB #88D1F1 #BFE6F8

Accessibility & contrast

On white

2.16

#51BCEB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.74

#51BCEB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCEB

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCEB	#FFFFFF	#000000	##000000
##51BCEB	1.00	2.16	9.74	9.74
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.74	21.00	1.00	1.00
##000000	9.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B9ED

Deuteranopia (green-blind)

#8FAAEA

Tritanopia (blue-blind)

#00C9CC

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bceb;
/* rgb */ color: rgb(81, 188, 235);
/* oklch */ color: oklch(75.2% 0.118 230.2);

Tailwind

colors: {
  custom: {
    50: '#91d0f1',
    500: '#51bceb',
    950: '#000000',
  },
}

SCSS

$custom: #51bceb;
$custom-light: #91d0f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51bceb",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 235
  },
  "hsl": {
    "h": 198.312,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.75193,
    "c": 0.11831,
    "h": 230.2
  },
  "luminance": 0.43714
}

Semantic roles & 50–950 ramp

primary

#51BCEB

secondary

#E8C1B0

accent

#4A0ADC

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCEB

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

Preview Lab → · Contrast checker → · Palette generator →