#57B0EB#57B0EB

#57B0EB is a light, vivid cyan. Relative luminance 0.391; OKLCH L 72.7% C 0.121 H 240.3°. Best body text is #000000 at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#57B0EB
RGB	rgb(87, 176, 235)
HSL	hsl(204, 79%, 63%)
HSV	hsv(204, 63%, 92%)
CMYK	cmyk(63%, 25.1%, 0%, 7.8%)
CIE-LAB	lab(68.80, -9.05, -37.44)
CIE-LCH	lch(68.80, 38.52, 256.41°)
OKLab	oklab(72.68% -0.0599 -0.1052)
OKLCH	oklch(72.68% 0.121 240.3)
XYZ	xyz(34.4455, 39.0716, 84.3074)
Luminance	0.3907 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#57B0EB #EB9257

analogous

#57EBDC #57B0EB #5766EB

triadic

#57B0EB #EB57B0 #B0EB57

tetradic

#57B0EB #DC57EB #EB9257 #66EB57

square

#57B0EB #DC57EB #EB9257 #66EB57

split-complementary

#57B0EB #EB5766 #EBDC57

monochromatic

#1574B2 #2096E4 #57B0EB #8ECAF2 #C4E3F8

Accessibility & contrast

On white

2.38

#57B0EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.82

#57B0EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #57B0EB

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##57B0EB	#FFFFFF	#000000	##000000
##57B0EB	1.00	2.38	8.82	8.82
#FFFFFF	2.38	1.00	21.00	21.00
#000000	8.82	21.00	1.00	1.00
##000000	8.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95B0EE

Deuteranopia (green-blind)

#81A1EA

Tritanopia (blue-blind)

#00BFC4

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #57b0eb;
/* rgb */ color: rgb(87, 176, 235);
/* oklch */ color: oklch(72.7% 0.121 240.3);

Tailwind

colors: {
  custom: {
    50: '#94c7f1',
    500: '#57b0eb',
    950: '#000000',
  },
}

SCSS

$custom: #57b0eb;
$custom-light: #94c7f1;
$custom-dark: #000000;

JSON

{
  "hex": "#57b0eb",
  "rgb": {
    "r": 87,
    "g": 176,
    "b": 235
  },
  "hsl": {
    "h": 203.919,
    "s": 78.723,
    "l": 63.137
  },
  "oklch": {
    "l": 0.72678,
    "c": 0.1211,
    "h": 240.3
  },
  "luminance": 0.39075
}

Semantic roles & 50–950 ramp

primary

#57B0EB

secondary

#E9CAB4

accent

#5E0ADB

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #57B0EB

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

Preview Lab → · Contrast checker → · Palette generator →