#51BBEA#51BBEA

#51BBEA is a light, moderate cyan. Relative luminance 0.432; OKLCH L 74.9% C 0.118 H 230.4°. Best body text is #000000 at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#51BBEA
RGB	rgb(81, 187, 234)
HSL	hsl(198, 78%, 62%)
HSV	hsv(198, 65%, 92%)
CMYK	cmyk(65.4%, 20.1%, 0%, 8.2%)
CIE-LAB	lab(71.71, -16.26, -32.41)
CIE-LCH	lch(71.71, 36.26, 243.35°)
OKLab	oklab(74.92% -0.0751 -0.0907)
OKLCH	oklch(74.92% 0.118 230.4)
XYZ	xyz(36.0091, 43.2267, 84.2718)
Luminance	0.4323 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBEA #EA8051

analogous

#51EACC #51BBEA #516FEA

triadic

#51BBEA #EA51BB #BBEA51

tetradic

#51BBEA #CC51EA #EA8051 #6FEA51

square

#51BBEA #CC51EA #EA8051 #6FEA51

split-complementary

#51BBEA #EA516F #EACC51

monochromatic

#157DAC #1BA5E2 #51BBEA #88D0F1 #BEE6F7

Accessibility & contrast

On white

2.18

#51BBEA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.65

#51BBEA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBEA

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBEA	#FFFFFF	#000000	##000000
##51BBEA	1.00	2.18	9.65	9.65
#FFFFFF	2.18	1.00	21.00	21.00
#000000	9.65	21.00	1.00	1.00
##000000	9.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3B8EC

Deuteranopia (green-blind)

#8EA9E9

Tritanopia (blue-blind)

#00C8CB

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bbea;
/* rgb */ color: rgb(81, 187, 234);
/* oklch */ color: oklch(74.9% 0.118 230.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#51bbea",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 234
  },
  "hsl": {
    "h": 198.431,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.7492,
    "c": 0.1178,
    "h": 230.4
  },
  "luminance": 0.4323
}

Semantic roles & 50–950 ramp

primary

#51BBEA

secondary

#E8C0AF

accent

#4B0BDB

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BBEA

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

Preview Lab → · Contrast checker → · Palette generator →