#51D5F4#51D5F4

#51D5F4 is a light, vivid cyan. Relative luminance 0.559; OKLCH L 81.3% C 0.121 H 216.4°. Best body text is #000000 at 12.17:1 contrast (WCAG AA passes).

Color values

HEX	#51D5F4
RGB	rgb(81, 213, 244)
HSL	hsl(191, 88%, 64%)
HSV	hsv(191, 67%, 96%)
CMYK	cmyk(66.8%, 12.7%, 0%, 4.3%)
CIE-LAB	lab(79.54, -26.45, -25.76)
CIE-LCH	lch(79.54, 36.92, 224.24°)
OKLab	oklab(81.31% -0.0973 -0.0717)
OKLCH	oklch(81.31% 0.121 216.4)
XYZ	xyz(43.5099, 55.8646, 94.0603)
Luminance	0.5587 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D5F4 #F47051

analogous

#51F4C1 #51D5F4 #5183F4

triadic

#51D5F4 #F451D5 #D5F451

tetradic

#51D5F4 #C151F4 #F47051 #83F451

square

#51D5F4 #C151F4 #F47051 #83F451

split-complementary

#51D5F4 #F45183 #F4C151

monochromatic

#0C9DBF #17C7F0 #51D5F4 #8BE3F8 #C4F1FB

Accessibility & contrast

On white

1.73

#51D5F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.17

#51D5F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D5F4

12.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D5F4	#FFFFFF	#000000	##000000
##51D5F4	1.00	1.73	12.17	12.17
#FFFFFF	1.73	1.00	21.00	21.00
#000000	12.17	21.00	1.00	1.00
##000000	12.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C0CFF6

Deuteranopia (green-blind)

#A9BEF4

Tritanopia (blue-blind)

#00E0DF

Achromatopsia (no color)

#C5C5C5

Design tokens & code

CSS

--color: #51d5f4;
/* rgb */ color: rgb(81, 213, 244);
/* oklch */ color: oklch(81.3% 0.121 216.4);

Tailwind

colors: {
  custom: {
    50: '#94e2f7',
    500: '#51d5f4',
    950: '#000000',
  },
}

SCSS

$custom: #51d5f4;
$custom-light: #94e2f7;
$custom-dark: #000000;

JSON

{
  "hex": "#51d5f4",
  "rgb": {
    "r": 81,
    "g": 213,
    "b": 244
  },
  "hsl": {
    "h": 191.411,
    "s": 88.108,
    "l": 63.725
  },
  "oklch": {
    "l": 0.81308,
    "c": 0.12086,
    "h": 216.4
  },
  "luminance": 0.55869
}

Semantic roles & 50–950 ramp

primary

#51D5F4

secondary

#BD482D

accent

#2C01E5

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D5F4

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

Preview Lab → · Contrast checker → · Palette generator →