#51BBD4#51BBD4

#51BBD4 is a light, moderate cyan. Relative luminance 0.420; OKLCH L 74.0% C 0.103 H 215.9°. Best body text is #000000 at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#51BBD4
RGB	rgb(81, 187, 212)
HSL	hsl(191, 60%, 57%)
HSV	hsv(191, 62%, 83%)
CMYK	cmyk(61.8%, 11.8%, 0%, 16.9%)
CIE-LAB	lab(70.90, -22.99, -21.67)
CIE-LCH	lch(70.90, 31.59, 223.31°)
OKLab	oklab(74% -0.0833 -0.0602)
OKLCH	oklch(74% 0.103 215.9)
XYZ	xyz(33.0425, 42.0400, 68.6478)
Luminance	0.4204 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBD4 #D46A51

analogous

#51D4AB #51BBD4 #517AD4

triadic

#51BBD4 #D451BB #BBD451

tetradic

#51BBD4 #AB51D4 #D46A51 #7AD451

square

#51BBD4 #AB51D4 #D46A51 #7AD451

split-complementary

#51BBD4 #D4517A #D4AB51

monochromatic

#227589 #2E9FBA #51BBD4 #82CEE0 #B3E1EC

Accessibility & contrast

On white

2.23

#51BBD4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.41

#51BBD4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBD4

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBD4	#FFFFFF	#000000	##000000
##51BBD4	1.00	2.23	9.41	9.41
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.41	21.00	1.00	1.00
##000000	9.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAB6D5

Deuteranopia (green-blind)

#97A7D4

Tritanopia (blue-blind)

#00C4C3

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #51bbd4;
/* rgb */ color: rgb(81, 187, 212);
/* oklch */ color: oklch(74.0% 0.103 215.9);

Tailwind

colors: {
  custom: {
    50: '#8fcfe1',
    500: '#51bbd4',
    950: '#000000',
  },
}

SCSS

$custom: #51bbd4;
$custom-light: #8fcfe1;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbd4",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 212
  },
  "hsl": {
    "h": 191.45,
    "s": 60.369,
    "l": 57.451
  },
  "oklch": {
    "l": 0.74004,
    "c": 0.10277,
    "h": 215.9
  },
  "luminance": 0.42043
}

Semantic roles & 50–950 ramp

primary

#51BBD4

secondary

#DBB0A6

accent

#6344E4

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BBD4

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

Preview Lab → · Contrast checker → · Palette generator →