#51B7EA#51B7EA

#51B7EA is a light, moderate cyan. Relative luminance 0.416; OKLCH L 74.0% C 0.119 H 233.4°. Best body text is #000000 at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#51B7EA
RGB	rgb(81, 183, 234)
HSL	hsl(200, 78%, 62%)
HSV	hsv(200, 65%, 92%)
CMYK	cmyk(65.4%, 21.8%, 0%, 8.2%)
CIE-LAB	lab(70.56, -14.14, -34.18)
CIE-LCH	lch(70.56, 36.99, 247.52°)
OKLab	oklab(74.01% -0.0711 -0.0958)
OKLCH	oklch(74.01% 0.119 233.4)
XYZ	xyz(35.1723, 41.5531, 83.9929)
Luminance	0.4156 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B7EA #EA8451

analogous

#51EAD1 #51B7EA #516BEA

triadic

#51B7EA #EA51B7 #B7EA51

tetradic

#51B7EA #D151EA #EA8451 #6BEA51

square

#51B7EA #D151EA #EA8451 #6BEA51

split-complementary

#51B7EA #EA516B #EAD151

monochromatic

#1579AC #1BA0E2 #51B7EA #88CEF1 #BEE4F7

Accessibility & contrast

On white

2.26

#51B7EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.31

#51B7EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B7EA

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B7EA	#FFFFFF	#000000	##000000
##51B7EA	1.00	2.26	9.31	9.31
#FFFFFF	2.26	1.00	21.00	21.00
#000000	9.31	21.00	1.00	1.00
##000000	9.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB5EC

Deuteranopia (green-blind)

#89A6E9

Tritanopia (blue-blind)

#00C5C8

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #51b7ea;
/* rgb */ color: rgb(81, 183, 234);
/* oklch */ color: oklch(74.0% 0.119 233.4);

Tailwind

colors: {
  custom: {
    50: '#91ccf1',
    500: '#51b7ea',
    950: '#000000',
  },
}

SCSS

$custom: #51b7ea;
$custom-light: #91ccf1;
$custom-dark: #000000;

JSON

{
  "hex": "#51b7ea",
  "rgb": {
    "r": 81,
    "g": 183,
    "b": 234
  },
  "hsl": {
    "h": 200,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.74006,
    "c": 0.11935,
    "h": 233.4
  },
  "luminance": 0.41557
}

Semantic roles & 50–950 ramp

primary

#51B7EA

secondary

#E8C2AF

accent

#500BDB

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B7EA

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

Preview Lab → · Contrast checker → · Palette generator →