#51CBE4#51CBE4

#51CBE4 is a light, moderate cyan. Relative luminance 0.501; OKLCH L 78.4% C 0.112 H 213.7°. Best body text is #000000 at 11.01:1 contrast (WCAG AA passes).

Color values

HEX	#51CBE4
RGB	rgb(81, 203, 228)
HSL	hsl(190, 73%, 61%)
HSV	hsv(190, 64%, 89%)
CMYK	cmyk(64.5%, 11%, 0%, 10.6%)
CIE-LAB	lab(76.11, -26.26, -22.42)
CIE-LCH	lch(76.11, 34.53, 220.49°)
OKLab	oklab(78.37% -0.0935 -0.0623)
OKLCH	oklch(78.37% 0.112 213.7)
XYZ	xyz(38.7471, 50.0584, 81.0040)
Luminance	0.5006 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51CBE4 #E46A51

analogous

#51E4B3 #51CBE4 #5181E4

triadic

#51CBE4 #E451CB #CBE451

tetradic

#51CBE4 #B351E4 #E46A51 #81E451

square

#51CBE4 #B351E4 #E46A51 #81E451

split-complementary

#51CBE4 #E45181 #E4B351

monochromatic

#198AA2 #21B8D7 #51CBE4 #86DBEC #BBEBF4

Accessibility & contrast

On white

1.91

#51CBE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.01

#51CBE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51CBE4

11.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51CBE4	#FFFFFF	#000000	##000000
##51CBE4	1.00	1.91	11.01	11.01
#FFFFFF	1.91	1.00	21.00	21.00
#000000	11.01	21.00	1.00	1.00
##000000	11.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B8C5E5

Deuteranopia (green-blind)

#A3B5E4

Tritanopia (blue-blind)

#00D5D3

Achromatopsia (no color)

#BCBCBC

Design tokens & code

CSS

--color: #51cbe4;
/* rgb */ color: rgb(81, 203, 228);
/* oklch */ color: oklch(78.4% 0.112 213.7);

Tailwind

colors: {
  custom: {
    50: '#92dbec',
    500: '#51cbe4',
    950: '#000000',
  },
}

SCSS

$custom: #51cbe4;
$custom-light: #92dbec;
$custom-dark: #000000;

JSON

{
  "hex": "#51cbe4",
  "rgb": {
    "r": 81,
    "g": 203,
    "b": 228
  },
  "hsl": {
    "h": 190.204,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.78368,
    "c": 0.11235,
    "h": 213.7
  },
  "luminance": 0.50063
}

Semantic roles & 50–950 ramp

primary

#51CBE4

secondary

#A44835

accent

#3210D5

background

#FCFEFE

surface

#F5FBFD

border

#CFD4D5

text

#0E1516

muted

#7F8484

Preview Lab

Preview with #51CBE4

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

Preview Lab → · Contrast checker → · Palette generator →