#51ABE4#51ABE4

#51ABE4 is a light, moderate cyan. Relative luminance 0.365; OKLCH L 71.0% C 0.120 H 239.4°. Best body text is #000000 at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#51ABE4
RGB	rgb(81, 171, 228)
HSL	hsl(203, 73%, 61%)
HSV	hsv(203, 64%, 89%)
CMYK	cmyk(64.5%, 25%, 0%, 10.6%)
CIE-LAB	lab(66.88, -9.57, -36.62)
CIE-LCH	lch(66.88, 37.85, 255.35°)
OKLab	oklab(71% -0.061 -0.103)
OKLCH	oklch(71% 0.12 239.4)
XYZ	xyz(31.9545, 36.4733, 78.7398)
Luminance	0.3648 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51ABE4 #E48A51

analogous

#51E4D3 #51ABE4 #5162E4

triadic

#51ABE4 #E451AB #ABE451

tetradic

#51ABE4 #D351E4 #E48A51 #62E451

square

#51ABE4 #D351E4 #E48A51 #62E451

split-complementary

#51ABE4 #E45162 #E4D351

monochromatic

#196DA2 #2190D7 #51ABE4 #86C5EC #BBDEF4

Accessibility & contrast

On white

2.53

#51ABE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.30

#51ABE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ABE4

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51ABE4	#FFFFFF	#000000	##000000
##51ABE4	1.00	2.53	8.30	8.30
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.30	21.00	1.00	1.00
##000000	8.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91ABE7

Deuteranopia (green-blind)

#7D9CE3

Tritanopia (blue-blind)

#00B9BE

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #51abe4;
/* rgb */ color: rgb(81, 171, 228);
/* oklch */ color: oklch(71.0% 0.120 239.4);

Tailwind

colors: {
  custom: {
    50: '#90c3ec',
    500: '#51abe4',
    950: '#000000',
  },
}

SCSS

$custom: #51abe4;
$custom-light: #90c3ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51abe4",
  "rgb": {
    "r": 81,
    "g": 171,
    "b": 228
  },
  "hsl": {
    "h": 203.265,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.71001,
    "c": 0.11967,
    "h": 239.4
  },
  "luminance": 0.36477
}

Semantic roles & 50–950 ramp

primary

#51ABE4

secondary

#E4C2AC

accent

#5D10D5

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51ABE4

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

Preview Lab → · Contrast checker → · Palette generator →