#51D3F4#51D3F4

#51D3F4 is a light, vivid cyan. Relative luminance 0.549; OKLCH L 80.8% C 0.121 H 217.9°. Best body text is #000000 at 11.97:1 contrast (WCAG AA passes).

Color values

HEX	#51D3F4
RGB	rgb(81, 211, 244)
HSL	hsl(192, 88%, 64%)
HSV	hsv(192, 67%, 96%)
CMYK	cmyk(66.8%, 13.5%, 0%, 4.3%)
CIE-LAB	lab(78.96, -25.46, -26.64)
CIE-LCH	lch(78.96, 36.85, 226.30°)
OKLab	oklab(80.85% -0.0953 -0.0742)
OKLCH	oklch(80.85% 0.121 217.9)
XYZ	xyz(43.0100, 54.8647, 93.8936)
Luminance	0.5487 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D3F4 #F47251

analogous

#51F4C3 #51D3F4 #5181F4

triadic

#51D3F4 #F451D3 #D3F451

tetradic

#51D3F4 #C351F4 #F47251 #81F451

square

#51D3F4 #C351F4 #F47251 #81F451

split-complementary

#51D3F4 #F45181 #F4C351

monochromatic

#0C9ABF #17C4F0 #51D3F4 #8BE2F8 #C4F0FB

Accessibility & contrast

On white

1.75

#51D3F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.97

#51D3F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D3F4

11.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D3F4	#FFFFFF	#000000	##000000
##51D3F4	1.00	1.75	11.97	11.97
#FFFFFF	1.75	1.00	21.00	21.00
#000000	11.97	21.00	1.00	1.00
##000000	11.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BECDF6

Deuteranopia (green-blind)

#A7BCF4

Tritanopia (blue-blind)

#00DEDD

Achromatopsia (no color)

#C3C3C3

Design tokens & code

CSS

--color: #51d3f4;
/* rgb */ color: rgb(81, 211, 244);
/* oklch */ color: oklch(80.8% 0.121 217.9);

Tailwind

colors: {
  custom: {
    50: '#94e0f7',
    500: '#51d3f4',
    950: '#000000',
  },
}

SCSS

$custom: #51d3f4;
$custom-light: #94e0f7;
$custom-dark: #000000;

JSON

{
  "hex": "#51d3f4",
  "rgb": {
    "r": 81,
    "g": 211,
    "b": 244
  },
  "hsl": {
    "h": 192.147,
    "s": 88.108,
    "l": 63.725
  },
  "oklch": {
    "l": 0.80848,
    "c": 0.1208,
    "h": 217.9
  },
  "luminance": 0.5487
}

Semantic roles & 50–950 ramp

primary

#51D3F4

secondary

#BD4A2D

accent

#2F01E5

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D3F4

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

Preview Lab → · Contrast checker → · Palette generator →