#51BDEA#51BDEA

#51BDEA is a light, moderate cyan. Relative luminance 0.441; OKLCH L 75.4% C 0.117 H 228.8°. Best body text is #000000 at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#51BDEA
RGB	rgb(81, 189, 234)
HSL	hsl(198, 78%, 62%)
HSV	hsv(198, 65%, 92%)
CMYK	cmyk(65.4%, 19.2%, 0%, 8.2%)
CIE-LAB	lab(72.28, -17.31, -31.52)
CIE-LCH	lch(72.28, 35.96, 241.23°)
OKLab	oklab(75.38% -0.0771 -0.0882)
OKLCH	oklch(75.38% 0.117 228.8)
XYZ	xyz(36.4363, 44.0811, 84.4142)
Luminance	0.4409 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BDEA #EA7E51

analogous

#51EACB #51BDEA #5171EA

triadic

#51BDEA #EA51BD #BDEA51

tetradic

#51BDEA #CB51EA #EA7E51 #71EA51

square

#51BDEA #CB51EA #EA7E51 #71EA51

split-complementary

#51BDEA #EA5171 #EACB51

monochromatic

#157FAC #1BA8E2 #51BDEA #88D2F1 #BEE6F7

Accessibility & contrast

On white

2.14

#51BDEA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.82

#51BDEA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDEA

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BDEA	#FFFFFF	#000000	##000000
##51BDEA	1.00	2.14	9.82	9.82
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.82	21.00	1.00	1.00
##000000	9.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6BAEC

Deuteranopia (green-blind)

#90AAE9

Tritanopia (blue-blind)

#00CACC

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bdea;
/* rgb */ color: rgb(81, 189, 234);
/* oklch */ color: oklch(75.4% 0.117 228.8);

Tailwind

colors: {
  custom: {
    50: '#91d1f1',
    500: '#51bdea',
    950: '#000000',
  },
}

SCSS

$custom: #51bdea;
$custom-light: #91d1f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51bdea",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 234
  },
  "hsl": {
    "h": 197.647,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.75378,
    "c": 0.11716,
    "h": 228.8
  },
  "luminance": 0.44085
}

Semantic roles & 50–950 ramp

primary

#51BDEA

secondary

#E8C0AF

accent

#480BDB

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BDEA

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

Preview Lab → · Contrast checker → · Palette generator →