#3577B9#3577B9

#3577B9 is a mid, vivid cyan. Relative luminance 0.175; OKLCH L 55.8% C 0.123 H 251.0°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3577B9
RGB	rgb(53, 119, 185)
HSL	hsl(210, 55%, 47%)
HSV	hsv(210, 71%, 73%)
CMYK	cmyk(71.4%, 35.7%, 0%, 27.5%)
CIE-LAB	lab(48.82, 1.29, -40.84)
CIE-LCH	lch(48.82, 40.86, 271.82°)
OKLab	oklab(55.84% -0.04 -0.1161)
OKLCH	oklch(55.84% 0.123 251)
XYZ	xyz(16.8187, 17.4515, 48.3716)
Luminance	0.1745 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3577B9 #B97735

analogous

#35B9B9 #3577B9 #3535B9

triadic

#3577B9 #B93577 #77B935

tetradic

#3577B9 #B935B9 #B97735 #35B935

square

#3577B9 #B935B9 #B97735 #35B935

split-complementary

#3577B9 #B93535 #B9B935

monochromatic

#1A3A5A #275889 #3577B9 #5B96D0 #8BB4DE

Accessibility & contrast

On white

4.68

#3577B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3577B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3577B9

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3577B9	#FFFFFF	#000000	##FFFFFF
##3577B9	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#597BBC

Deuteranopia (green-blind)

#466EB8

Tritanopia (blue-blind)

#00878F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3577b9;
/* rgb */ color: rgb(53, 119, 185);
/* oklch */ color: oklch(55.8% 0.123 251.0);

Tailwind

colors: {
  custom: {
    50: '#7c9dce',
    500: '#3577b9',
    950: '#000000',
  },
}

SCSS

$custom: #3577b9;
$custom-light: #7c9dce;
$custom-dark: #000000;

JSON

{
  "hex": "#3577b9",
  "rgb": {
    "r": 53,
    "g": 119,
    "b": 185
  },
  "hsl": {
    "h": 210,
    "s": 55.462,
    "l": 46.667
  },
  "oklch": {
    "l": 0.55839,
    "c": 0.12278,
    "h": 251
  },
  "luminance": 0.17453
}

Semantic roles & 50–950 ramp

primary

#3577B9

secondary

#C8A582

accent

#9449DF

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3577B9

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

Preview Lab → · Contrast checker → · Palette generator →