#579BCB#579BCB

#579BCB is a light, moderate cyan. Relative luminance 0.298; OKLCH L 66.4% C 0.100 H 241.2°. Best body text is #000000 at 6.96:1 contrast (WCAG AA passes).

Color values

HEX	#579BCB
RGB	rgb(87, 155, 203)
HSL	hsl(205, 53%, 57%)
HSV	hsv(205, 57%, 80%)
CMYK	cmyk(57.1%, 23.6%, 0%, 20.4%)
CIE-LAB	lab(61.46, -7.55, -31.18)
CIE-LCH	lch(61.46, 32.08, 256.39°)
OKLab	oklab(66.43% -0.048 -0.0873)
OKLCH	oklch(66.43% 0.1 241.2)
XYZ	xyz(26.4273, 29.7784, 60.8435)
Luminance	0.2978 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#579BCB #CB8757

analogous

#57CBC1 #579BCB #5761CB

triadic

#579BCB #CB579B #9BCB57

tetradic

#579BCB #C157CB #CB8757 #61CB57

square

#579BCB #C157CB #CB8757 #61CB57

split-complementary

#579BCB #CB5761 #CBC157

monochromatic

#285B80 #367DAF #579BCB #86B7D9 #B4D3E8

Accessibility & contrast

On white

3.02

#579BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.96

#579BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #579BCB

6.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##579BCB	#FFFFFF	#000000	##000000
##579BCB	1.00	3.02	6.96	6.96
#FFFFFF	3.02	1.00	21.00	21.00
#000000	6.96	21.00	1.00	1.00
##000000	6.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#869BCD

Deuteranopia (green-blind)

#768FCA

Tritanopia (blue-blind)

#00A7AB

Achromatopsia (no color)

#949494

Design tokens & code

CSS

--color: #579bcb;
/* rgb */ color: rgb(87, 155, 203);
/* oklch */ color: oklch(66.4% 0.100 241.2);

Tailwind

colors: {
  custom: {
    50: '#8fb8db',
    500: '#579bcb',
    950: '#000000',
  },
}

SCSS

$custom: #579bcb;
$custom-light: #8fb8db;
$custom-dark: #000000;

JSON

{
  "hex": "#579bcb",
  "rgb": {
    "r": 87,
    "g": 155,
    "b": 203
  },
  "hsl": {
    "h": 204.828,
    "s": 52.727,
    "l": 56.863
  },
  "oklch": {
    "l": 0.66429,
    "c": 0.09963,
    "h": 241.2
  },
  "luminance": 0.29781
}

Semantic roles & 50–950 ramp

primary

#579BCB

secondary

#D7BBA7

accent

#874CDC

background

#F9FBFD

surface

#F2F6FB

border

#CCD0D4

text

#0D1115

muted

#7E8083

Preview Lab

Preview with #579BCB

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

Preview Lab → · Contrast checker → · Palette generator →