#51BBEB#51BBEB

#51BBEB is a light, moderate cyan. Relative luminance 0.433; OKLCH L 75.0% C 0.119 H 230.9°. Best body text is #000000 at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#51BBEB
RGB	rgb(81, 187, 235)
HSL	hsl(199, 79%, 62%)
HSV	hsv(199, 66%, 92%)
CMYK	cmyk(65.5%, 20.4%, 0%, 7.8%)
CIE-LAB	lab(71.75, -15.95, -32.89)
CIE-LCH	lch(71.75, 36.55, 244.13°)
OKLab	oklab(74.96% -0.0748 -0.0921)
OKLCH	oklch(74.96% 0.119 230.9)
XYZ	xyz(36.1531, 43.2843, 85.0305)
Luminance	0.4329 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBEB #EB8151

analogous

#51EBCE #51BBEB #516EEB

triadic

#51BBEB #EB51BB #BBEB51

tetradic

#51BBEB #CE51EB #EB8151 #6EEB51

square

#51BBEB #CE51EB #EB8151 #6EEB51

split-complementary

#51BBEB #EB516E #EBCE51

monochromatic

#147EAE #1AA5E5 #51BBEB #88D0F1 #BFE6F8

Accessibility & contrast

On white

2.17

#51BBEB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.66

#51BBEB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBEB

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBEB	#FFFFFF	#000000	##000000
##51BBEB	1.00	2.17	9.66	9.66
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.66	21.00	1.00	1.00
##000000	9.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3B9ED

Deuteranopia (green-blind)

#8EA9EA

Tritanopia (blue-blind)

#00C8CB

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bbeb;
/* rgb */ color: rgb(81, 187, 235);
/* oklch */ color: oklch(75.0% 0.119 230.9);

Tailwind

colors: {
  custom: {
    50: '#91cff1',
    500: '#51bbeb',
    950: '#000000',
  },
}

SCSS

$custom: #51bbeb;
$custom-light: #91cff1;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbeb",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 235
  },
  "hsl": {
    "h": 198.701,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.74964,
    "c": 0.11865,
    "h": 230.9
  },
  "luminance": 0.43288
}

Semantic roles & 50–950 ramp

primary

#51BBEB

secondary

#E8C1B0

accent

#4B0ADC

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BBEB

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

Preview Lab → · Contrast checker → · Palette generator →