#51CAF0#51CAF0

#51CAF0 is a light, moderate cyan. Relative luminance 0.503; OKLCH L 78.6% C 0.119 H 222.3°. Best body text is #000000 at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#51CAF0
RGB	rgb(81, 202, 240)
HSL	hsl(194, 84%, 63%)
HSV	hsv(194, 66%, 94%)
CMYK	cmyk(66.3%, 15.8%, 0%, 5.9%)
CIE-LAB	lab(76.24, -22.15, -28.67)
CIE-LCH	lch(76.24, 36.23, 232.30°)
OKLab	oklab(78.62% -0.0879 -0.08)
OKLCH	oklch(78.62% 0.119 222.3)
XYZ	xyz(40.2357, 50.2773, 90.0052)
Luminance	0.5028 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51CAF0 #F07751

analogous

#51F0C7 #51CAF0 #517AF0

triadic

#51CAF0 #F051CA #CAF051

tetradic

#51CAF0 #C751F0 #F07751 #7AF051

square

#51CAF0 #C751F0 #F07751 #7AF051

split-complementary

#51CAF0 #F0517A #F0C751

monochromatic

#108FB7 #19B9EB #51CAF0 #89DBF5 #C2ECFA

Accessibility & contrast

On white

1.90

#51CAF0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.06

#51CAF0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51CAF0

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51CAF0	#FFFFFF	#000000	##000000
##51CAF0	1.00	1.90	11.06	11.06
#FFFFFF	1.90	1.00	21.00	21.00
#000000	11.06	21.00	1.00	1.00
##000000	11.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B4C5F2

Deuteranopia (green-blind)

#9EB5F0

Tritanopia (blue-blind)

#00D6D6

Achromatopsia (no color)

#BCBCBC

Design tokens & code

CSS

--color: #51caf0;
/* rgb */ color: rgb(81, 202, 240);
/* oklch */ color: oklch(78.6% 0.119 222.3);

Tailwind

colors: {
  custom: {
    50: '#93daf5',
    500: '#51caf0',
    950: '#000000',
  },
}

SCSS

$custom: #51caf0;
$custom-light: #93daf5;
$custom-dark: #000000;

JSON

{
  "hex": "#51caf0",
  "rgb": {
    "r": 81,
    "g": 202,
    "b": 240
  },
  "hsl": {
    "h": 194.34,
    "s": 84.127,
    "l": 62.941
  },
  "oklch": {
    "l": 0.78616,
    "c": 0.11888,
    "h": 222.3
  },
  "luminance": 0.50282
}

Semantic roles & 50–950 ramp

primary

#51CAF0

secondary

#B64F2F

accent

#3905E1

background

#FCFEFF

surface

#F5FBFE

border

#CFD4D6

text

#0E1417

muted

#7F8385

Preview Lab

Preview with #51CAF0

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

Preview Lab → · Contrast checker → · Palette generator →