#51C0EB#51C0EB

#51C0EB is a light, moderate cyan. Relative luminance 0.454; OKLCH L 76.1% C 0.117 H 227.1°. Best body text is #000000 at 10.09:1 contrast (WCAG AA passes).

Color values

HEX	#51C0EB
RGB	rgb(81, 192, 235)
HSL	hsl(197, 79%, 62%)
HSV	hsv(197, 66%, 92%)
CMYK	cmyk(65.5%, 18.3%, 0%, 7.8%)
CIE-LAB	lab(73.18, -18.56, -30.67)
CIE-LCH	lch(73.18, 35.85, 238.82°)
OKLab	oklab(76.11% -0.0798 -0.0858)
OKLCH	oklch(76.11% 0.117 227.1)
XYZ	xyz(37.2324, 45.4428, 85.3903)
Luminance	0.4545 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C0EB #EB7C51

analogous

#51EBC9 #51C0EB #5173EB

triadic

#51C0EB #EB51C0 #C0EB51

tetradic

#51C0EB #C951EB #EB7C51 #73EB51

square

#51C0EB #C951EB #EB7C51 #73EB51

split-complementary

#51C0EB #EB5173 #EBC951

monochromatic

#1483AE #1AACE5 #51C0EB #88D4F1 #BFE8F8

Accessibility & contrast

On white

2.08

#51C0EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.09

#51C0EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0EB

10.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C0EB	#FFFFFF	#000000	##000000
##51C0EB	1.00	2.08	10.09	10.09
#FFFFFF	2.08	1.00	21.00	21.00
#000000	10.09	21.00	1.00	1.00
##000000	10.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9BDED

Deuteranopia (green-blind)

#94ADEA

Tritanopia (blue-blind)

#00CCCE

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #51c0eb;
/* rgb */ color: rgb(81, 192, 235);
/* oklch */ color: oklch(76.1% 0.117 227.1);

Tailwind

colors: {
  custom: {
    50: '#92d3f1',
    500: '#51c0eb',
    950: '#000000',
  },
}

SCSS

$custom: #51c0eb;
$custom-light: #92d3f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51c0eb",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 235
  },
  "hsl": {
    "h": 196.753,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.76109,
    "c": 0.11713,
    "h": 227.1
  },
  "luminance": 0.45447
}

Semantic roles & 50–950 ramp

primary

#51C0EB

secondary

#E8BFB0

accent

#440ADC

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51C0EB

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

Preview Lab → · Contrast checker → · Palette generator →