#3579B9#3579B9

#3579B9 is a mid, vivid cyan. Relative luminance 0.179; OKLCH L 56.3% C 0.121 H 249.7°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3579B9
RGB	rgb(53, 121, 185)
HSL	hsl(209, 55%, 47%)
HSV	hsv(209, 71%, 73%)
CMYK	cmyk(71.4%, 34.6%, 0%, 27.5%)
CIE-LAB	lab(49.41, 0.08, -39.91)
CIE-LCH	lch(49.41, 39.91, 270.12°)
OKLab	oklab(56.3% -0.042 -0.1133)
OKLCH	oklch(56.3% 0.121 249.7)
XYZ	xyz(17.0592, 17.9325, 48.4518)
Luminance	0.1793 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3579B9 #B97535

analogous

#35B9B7 #3579B9 #3537B9

triadic

#3579B9 #B93579 #79B935

tetradic

#3579B9 #B735B9 #B97535 #37B935

square

#3579B9 #B735B9 #B97535 #37B935

split-complementary

#3579B9 #B93537 #B9B735

monochromatic

#1A3B5A #275A89 #3579B9 #5B97D0 #8BB5DE

Accessibility & contrast

On white

4.58

#3579B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#3579B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3579B9

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3579B9	#FFFFFF	#000000	##000000
##3579B9	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7CBC

Deuteranopia (green-blind)

#4970B8

Tritanopia (blue-blind)

#008890

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3579b9;
/* rgb */ color: rgb(53, 121, 185);
/* oklch */ color: oklch(56.3% 0.121 249.7);

Tailwind

colors: {
  custom: {
    50: '#7c9fce',
    500: '#3579b9',
    950: '#000000',
  },
}

SCSS

$custom: #3579b9;
$custom-light: #7c9fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3579b9",
  "rgb": {
    "r": 53,
    "g": 121,
    "b": 185
  },
  "hsl": {
    "h": 209.091,
    "s": 55.462,
    "l": 46.667
  },
  "oklch": {
    "l": 0.56302,
    "c": 0.12083,
    "h": 249.7
  },
  "luminance": 0.17934
}

Semantic roles & 50–950 ramp

primary

#3579B9

secondary

#C8A482

accent

#9249DF

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3579B9

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

Preview Lab → · Contrast checker → · Palette generator →