#57B9EB#57B9EB

#57B9EB is a light, moderate cyan. Relative luminance 0.427; OKLCH L 74.7% C 0.116 H 233.6°. Best body text is #000000 at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#57B9EB
RGB	rgb(87, 185, 235)
HSL	hsl(200, 79%, 63%)
HSV	hsv(200, 63%, 92%)
CMYK	cmyk(63%, 21.3%, 0%, 7.8%)
CIE-LAB	lab(71.36, -13.90, -33.47)
CIE-LCH	lch(71.36, 36.24, 247.44°)
OKLab	oklab(74.71% -0.0691 -0.0937)
OKLCH	oklch(74.71% 0.116 233.6)
XYZ	xyz(36.2690, 42.7186, 84.9153)
Luminance	0.4272 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#57B9EB #EB8957

analogous

#57EBD3 #57B9EB #576FEB

triadic

#57B9EB #EB57B9 #B9EB57

tetradic

#57B9EB #D357EB #EB8957 #6FEB57

square

#57B9EB #D357EB #EB8957 #6FEB57

split-complementary

#57B9EB #EB576F #EBD357

monochromatic

#157DB2 #20A2E4 #57B9EB #8ED0F2 #C4E7F8

Accessibility & contrast

On white

2.20

#57B9EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.54

#57B9EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #57B9EB

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##57B9EB	#FFFFFF	#000000	##000000
##57B9EB	1.00	2.20	9.54	9.54
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.54	21.00	1.00	1.00
##000000	9.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1B7ED

Deuteranopia (green-blind)

#8CA8EA

Tritanopia (blue-blind)

#00C6CA

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #57b9eb;
/* rgb */ color: rgb(87, 185, 235);
/* oklch */ color: oklch(74.7% 0.116 233.6);

Tailwind

colors: {
  custom: {
    50: '#94cef1',
    500: '#57b9eb',
    950: '#000000',
  },
}

SCSS

$custom: #57b9eb;
$custom-light: #94cef1;
$custom-dark: #000000;

JSON

{
  "hex": "#57b9eb",
  "rgb": {
    "r": 87,
    "g": 185,
    "b": 235
  },
  "hsl": {
    "h": 200.27,
    "s": 78.723,
    "l": 63.137
  },
  "oklch": {
    "l": 0.74711,
    "c": 0.11648,
    "h": 233.6
  },
  "luminance": 0.42722
}

Semantic roles & 50–950 ramp

primary

#57B9EB

secondary

#E9C6B4

accent

#510ADB

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #57B9EB

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

Preview Lab → · Contrast checker → · Palette generator →