#57B1EB#57B1EB

#57B1EB is a light, vivid cyan. Relative luminance 0.395; OKLCH L 72.9% C 0.121 H 239.6°. Best body text is #000000 at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#57B1EB
RGB	rgb(87, 177, 235)
HSL	hsl(204, 79%, 63%)
HSV	hsv(204, 63%, 92%)
CMYK	cmyk(63%, 24.7%, 0%, 7.8%)
CIE-LAB	lab(69.09, -9.60, -37.00)
CIE-LCH	lch(69.09, 38.22, 255.46°)
OKLab	oklab(72.9% -0.061 -0.1039)
OKLCH	oklch(72.9% 0.121 239.6)
XYZ	xyz(34.6423, 39.4652, 84.3730)
Luminance	0.3947 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#57B1EB #EB9157

analogous

#57EBDB #57B1EB #5767EB

triadic

#57B1EB #EB57B1 #B1EB57

tetradic

#57B1EB #DB57EB #EB9157 #67EB57

square

#57B1EB #DB57EB #EB9157 #67EB57

split-complementary

#57B1EB #EB5767 #EBDB57

monochromatic

#1575B2 #2098E4 #57B1EB #8ECAF2 #C4E4F8

Accessibility & contrast

On white

2.36

#57B1EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.89

#57B1EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #57B1EB

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##57B1EB	#FFFFFF	#000000	##000000
##57B1EB	1.00	2.36	8.89	8.89
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.89	21.00	1.00	1.00
##000000	8.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#96B1EE

Deuteranopia (green-blind)

#82A2EA

Tritanopia (blue-blind)

#00C0C5

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #57b1eb;
/* rgb */ color: rgb(87, 177, 235);
/* oklch */ color: oklch(72.9% 0.121 239.6);

Tailwind

colors: {
  custom: {
    50: '#94c8f1',
    500: '#57b1eb',
    950: '#000000',
  },
}

SCSS

$custom: #57b1eb;
$custom-light: #94c8f1;
$custom-dark: #000000;

JSON

{
  "hex": "#57b1eb",
  "rgb": {
    "r": 87,
    "g": 177,
    "b": 235
  },
  "hsl": {
    "h": 203.514,
    "s": 78.723,
    "l": 63.137
  },
  "oklch": {
    "l": 0.72903,
    "c": 0.12051,
    "h": 239.6
  },
  "luminance": 0.39469
}

Semantic roles & 50–950 ramp

primary

#57B1EB

secondary

#E9C9B4

accent

#5C0ADB

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #57B1EB

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

Preview Lab → · Contrast checker → · Palette generator →