#3577BB#3577BB

#3577BB is a mid, vivid cyan. Relative luminance 0.175; OKLCH L 56.0% C 0.125 H 251.6°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3577BB
RGB	rgb(53, 119, 187)
HSL	hsl(210, 56%, 47%)
HSV	hsv(210, 72%, 73%)
CMYK	cmyk(71.7%, 36.4%, 0%, 26.7%)
CIE-LAB	lab(48.93, 2.02, -41.83)
CIE-LCH	lch(48.93, 41.88, 272.76°)
OKLab	oklab(55.96% -0.0395 -0.1189)
OKLCH	oklch(55.96% 0.125 251.6)
XYZ	xyz(17.0313, 17.5365, 49.4914)
Luminance	0.1754 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3577BB #BB7935

analogous

#35BABB #3577BB #3635BB

triadic

#3577BB #BB3577 #77BB35

tetradic

#3577BB #BB35BA #BB7935 #35BB36

square

#3577BB #BB35BA #BB7935 #35BB36

split-complementary

#3577BB #BB3635 #BABB35

monochromatic

#1A3A5C #27598B #3577BB #5C96D1 #8CB5DE

Accessibility & contrast

On white

4.66

#3577BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#3577BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3577BB

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3577BB	#FFFFFF	#000000	##FFFFFF
##3577BB	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#587BBE

Deuteranopia (green-blind)

#446FBA

Tritanopia (blue-blind)

#008790

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3577bb;
/* rgb */ color: rgb(53, 119, 187);
/* oklch */ color: oklch(56.0% 0.125 251.6);

Tailwind

colors: {
  custom: {
    50: '#7d9dd0',
    500: '#3577bb',
    950: '#000000',
  },
}

SCSS

$custom: #3577bb;
$custom-light: #7d9dd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3577bb",
  "rgb": {
    "r": 53,
    "g": 119,
    "b": 187
  },
  "hsl": {
    "h": 210.448,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.55956,
    "c": 0.12533,
    "h": 251.6
  },
  "luminance": 0.17538
}

Semantic roles & 50–950 ramp

primary

#3577BB

secondary

#C9A683

accent

#9549DF

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3577BB

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

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