#3579CC#3579CC

#3579CC is a mid, vivid cyan. Relative luminance 0.188; OKLCH L 57.4% C 0.145 H 255.1°. Best body text is #000000 at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#3579CC
RGB	rgb(53, 121, 204)
HSL	hsl(213, 60%, 50%)
HSV	hsv(213, 74%, 80%)
CMYK	cmyk(74%, 40.7%, 0%, 20%)
CIE-LAB	lab(50.44, 7.00, -49.17)
CIE-LCH	lch(50.44, 49.67, 278.10°)
OKLab	oklab(57.44% -0.0372 -0.1404)
OKLCH	oklch(57.44% 0.145 255.1)
XYZ	xyz(19.2006, 18.7891, 59.7298)
Luminance	0.1879 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3579CC #CC8835

analogous

#35C5CC #3579CC #3C35CC

triadic

#3579CC #CC3579 #79CC35

tetradic

#3579CC #CC35C5 #CC8835 #35CC3C

square

#3579CC #CC35C5 #CC8835 #35CC3C

split-complementary

#3579CC #CC3C35 #C5CC35

monochromatic

#1B3F6B #275C9C #3579CC #6699D8 #97BAE5

Accessibility & contrast

On white

4.41

#3579CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.76

#3579CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3579CC

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3579CC	#FFFFFF	#000000	##000000
##3579CC	1.00	4.41	4.76	4.76
#FFFFFF	4.41	1.00	21.00	21.00
#000000	4.76	21.00	1.00	1.00
##000000	4.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5180CF

Deuteranopia (green-blind)

#3872CA

Tritanopia (blue-blind)

#008D98

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3579cc;
/* rgb */ color: rgb(53, 121, 204);
/* oklch */ color: oklch(57.4% 0.145 255.1);

Tailwind

colors: {
  custom: {
    50: '#809fdc',
    500: '#3579cc',
    950: '#000000',
  },
}

SCSS

$custom: #3579cc;
$custom-light: #809fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3579cc",
  "rgb": {
    "r": 53,
    "g": 121,
    "b": 204
  },
  "hsl": {
    "h": 212.98,
    "s": 59.684,
    "l": 50.392
  },
  "oklch": {
    "l": 0.57437,
    "c": 0.14531,
    "h": 255.1
  },
  "luminance": 0.18791
}

Semantic roles & 50–950 ramp

primary

#3579CC

secondary

#D0B28D

accent

#9C45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3579CC

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

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