#51B2EA#51B2EA

#51B2EA is a light, vivid cyan. Relative luminance 0.395; OKLCH L 72.9% C 0.122 H 237.1°. Best body text is #000000 at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#51B2EA
RGB	rgb(81, 178, 234)
HSL	hsl(202, 78%, 62%)
HSV	hsv(202, 65%, 92%)
CMYK	cmyk(65.4%, 23.9%, 0%, 8.2%)
CIE-LAB	lab(69.13, -11.46, -36.40)
CIE-LCH	lch(69.13, 38.16, 252.53°)
OKLab	oklab(72.87% -0.0661 -0.1023)
OKLCH	oklch(72.87% 0.122 237.1)
XYZ	xyz(34.1593, 39.5270, 83.6552)
Luminance	0.3953 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2EA #EA8951

analogous

#51EAD6 #51B2EA #5166EA

triadic

#51B2EA #EA51B2 #B2EA51

tetradic

#51B2EA #D651EA #EA8951 #66EA51

square

#51B2EA #D651EA #EA8951 #66EA51

split-complementary

#51B2EA #EA5166 #EAD651

monochromatic

#1575AC #1B9AE2 #51B2EA #88CAF1 #BEE2F7

Accessibility & contrast

On white

2.36

#51B2EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.91

#51B2EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2EA

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2EA	#FFFFFF	#000000	##000000
##51B2EA	1.00	2.36	8.91	8.91
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.91	21.00	1.00	1.00
##000000	8.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#98B1ED

Deuteranopia (green-blind)

#83A2E9

Tritanopia (blue-blind)

#00C0C5

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #51b2ea;
/* rgb */ color: rgb(81, 178, 234);
/* oklch */ color: oklch(72.9% 0.122 237.1);

Tailwind

colors: {
  custom: {
    50: '#91c9f1',
    500: '#51b2ea',
    950: '#000000',
  },
}

SCSS

$custom: #51b2ea;
$custom-light: #91c9f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2ea",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 234
  },
  "hsl": {
    "h": 201.961,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.72869,
    "c": 0.12177,
    "h": 237.1
  },
  "luminance": 0.39531
}

Semantic roles & 50–950 ramp

primary

#51B2EA

secondary

#E8C4AF

accent

#570BDB

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B2EA

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

Preview Lab → · Contrast checker → · Palette generator →