#51BCE0#51BCE0

#51BCE0 is a light, moderate cyan. Relative luminance 0.431; OKLCH L 74.7% C 0.110 H 223.5°. Best body text is #000000 at 9.62:1 contrast (WCAG AA passes).

Color values

HEX	#51BCE0
RGB	rgb(81, 188, 224)
HSL	hsl(195, 70%, 60%)
HSV	hsv(195, 64%, 88%)
CMYK	cmyk(63.8%, 16.1%, 0%, 12.2%)
CIE-LAB	lab(71.62, -19.88, -27.11)
CIE-LCH	lch(71.62, 33.62, 233.75°)
OKLab	oklab(74.72% -0.0797 -0.0756)
OKLCH	oklch(74.72% 0.11 223.5)
XYZ	xyz(34.8257, 43.0939, 76.9892)
Luminance	0.4310 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCE0 #E07551

analogous

#51E0BD #51BCE0 #5175E0

triadic

#51BCE0 #E051BC #BCE051

tetradic

#51BCE0 #BD51E0 #E07551 #75E051

square

#51BCE0 #BD51E0 #E07551 #75E051

split-complementary

#51BCE0 #E05175 #E0BD51

monochromatic

#1C7B9B #25A4CF #51BCE0 #85D0E9 #B9E4F3

Accessibility & contrast

On white

2.18

#51BCE0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.62

#51BCE0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCE0

9.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCE0	#FFFFFF	#000000	##000000
##51BCE0	1.00	2.18	9.62	9.62
#FFFFFF	2.18	1.00	21.00	21.00
#000000	9.62	21.00	1.00	1.00
##000000	9.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8B8E2

Deuteranopia (green-blind)

#93A9E0

Tritanopia (blue-blind)

#00C7C8

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bce0;
/* rgb */ color: rgb(81, 188, 224);
/* oklch */ color: oklch(74.7% 0.110 223.5);

Tailwind

colors: {
  custom: {
    50: '#90d0e9',
    500: '#51bce0',
    950: '#000000',
  },
}

SCSS

$custom: #51bce0;
$custom-light: #90d0e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51bce0",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 224
  },
  "hsl": {
    "h": 195.105,
    "s": 69.756,
    "l": 59.804
  },
  "oklch": {
    "l": 0.74723,
    "c": 0.1099,
    "h": 223.5
  },
  "luminance": 0.43098
}

Semantic roles & 50–950 ramp

primary

#51BCE0

secondary

#E2B9AB

accent

#683BED

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCE0

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

Preview Lab → · Contrast checker → · Palette generator →