#3579BC#3579BC

#3579BC is a mid, vivid cyan. Relative luminance 0.181; OKLCH L 56.5% C 0.125 H 250.7°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3579BC
RGB	rgb(53, 121, 188)
HSL	hsl(210, 56%, 47%)
HSV	hsv(210, 72%, 74%)
CMYK	cmyk(71.8%, 35.6%, 0%, 26.3%)
CIE-LAB	lab(49.57, 1.17, -41.39)
CIE-LCH	lch(49.57, 41.41, 271.61°)
OKLab	oklab(56.47% -0.0411 -0.1176)
OKLCH	oklch(56.47% 0.125 250.7)
XYZ	xyz(17.3793, 18.0606, 50.1373)
Luminance	0.1806 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3579BC #BC7835

analogous

#35BCBC #3579BC #3535BC

triadic

#3579BC #BC3579 #79BC35

tetradic

#3579BC #BC35BC #BC7835 #35BC35

square

#3579BC #BC35BC #BC7835 #35BC35

split-complementary

#3579BC #BC3535 #BCBC35

monochromatic

#1A3C5D #285A8C #3579BC #5D98D1 #8DB6DF

Accessibility & contrast

On white

4.55

#3579BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#3579BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3579BC

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3579BC	#FFFFFF	#000000	##000000
##3579BC	1.00	4.55	4.61	4.61
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7DBF

Deuteranopia (green-blind)

#4770BB

Tritanopia (blue-blind)

#008991

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3579bc;
/* rgb */ color: rgb(53, 121, 188);
/* oklch */ color: oklch(56.5% 0.125 250.7);

Tailwind

colors: {
  custom: {
    50: '#7d9fd0',
    500: '#3579bc',
    950: '#000000',
  },
}

SCSS

$custom: #3579bc;
$custom-light: #7d9fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3579bc",
  "rgb": {
    "r": 53,
    "g": 121,
    "b": 188
  },
  "hsl": {
    "h": 209.778,
    "s": 56.017,
    "l": 47.255
  },
  "oklch": {
    "l": 0.56475,
    "c": 0.12463,
    "h": 250.7
  },
  "luminance": 0.18062
}

Semantic roles & 50–950 ramp

primary

#3579BC

secondary

#C9A684

accent

#9348DF

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3579BC

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

Preview Lab → · Contrast checker → · Palette generator →