#51C0D8#51C0D8

#51C0D8 is a light, moderate cyan. Relative luminance 0.444; OKLCH L 75.3% C 0.105 H 214.4°. Best body text is #000000 at 9.88:1 contrast (WCAG AA passes).

Color values

HEX	#51C0D8
RGB	rgb(81, 192, 216)
HSL	hsl(191, 63%, 58%)
HSV	hsv(191, 63%, 85%)
CMYK	cmyk(62.5%, 11.1%, 0%, 15.3%)
CIE-LAB	lab(72.50, -24.33, -21.42)
CIE-LCH	lch(72.50, 32.41, 221.36°)
OKLab	oklab(75.33% -0.0869 -0.0595)
OKLCH	oklch(75.33% 0.105 214.4)
XYZ	xyz(34.6326, 44.4028, 71.6979)
Luminance	0.4441 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C0D8 #D86951

analogous

#51D8AD #51C0D8 #517CD8

triadic

#51C0D8 #D851C0 #C0D851

tetradic

#51C0D8 #AD51D8 #D86951 #7CD851

square

#51C0D8 #AD51D8 #D86951 #7CD851

split-complementary

#51C0D8 #D8517C #D8AD51

monochromatic

#207B8F #2BA6C1 #51C0D8 #83D2E3 #B5E4EE

Accessibility & contrast

On white

2.13

#51C0D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.88

#51C0D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0D8

9.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C0D8	#FFFFFF	#000000	##000000
##51C0D8	1.00	2.13	9.88	9.88
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.88	21.00	1.00	1.00
##000000	9.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AFBAD9

Deuteranopia (green-blind)

#9BACD8

Tritanopia (blue-blind)

#00C9C7

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51c0d8;
/* rgb */ color: rgb(81, 192, 216);
/* oklch */ color: oklch(75.3% 0.105 214.4);

Tailwind

colors: {
  custom: {
    50: '#90d3e4',
    500: '#51c0d8',
    950: '#000000',
  },
}

SCSS

$custom: #51c0d8;
$custom-light: #90d3e4;
$custom-dark: #000000;

JSON

{
  "hex": "#51c0d8",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 216
  },
  "hsl": {
    "h": 190.667,
    "s": 63.38,
    "l": 58.235
  },
  "oklch": {
    "l": 0.75333,
    "c": 0.10533,
    "h": 214.4
  },
  "luminance": 0.44406
}

Semantic roles & 50–950 ramp

primary

#51C0D8

secondary

#DDB1A8

accent

#5F41E6

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51C0D8

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

Preview Lab → · Contrast checker → · Palette generator →