#3577B1#3577B1

#3577B1 is a mid, moderate cyan. Relative luminance 0.171; OKLCH L 55.4% C 0.113 H 248.0°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3577B1
RGB	rgb(53, 119, 177)
HSL	hsl(208, 54%, 45%)
HSV	hsv(208, 70%, 69%)
CMYK	cmyk(70.1%, 32.8%, 0%, 30.6%)
CIE-LAB	lab(48.41, -1.59, -36.86)
CIE-LCH	lch(48.41, 36.89, 267.54°)
OKLab	oklab(55.38% -0.0423 -0.1044)
OKLCH	oklch(55.38% 0.113 248)
XYZ	xyz(15.9978, 17.1231, 44.0484)
Luminance	0.1713 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3577B1 #B16F35

analogous

#35B1AD #3577B1 #3539B1

triadic

#3577B1 #B13577 #77B135

tetradic

#3577B1 #AD35B1 #B16F35 #39B135

square

#3577B1 #AD35B1 #B16F35 #39B135

split-complementary

#3577B1 #B13539 #B1AD35

monochromatic

#193853 #275782 #3577B1 #5795CD #86B3DB

Accessibility & contrast

On white

4.75

#3577B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3577B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3577B1

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3577B1	#FFFFFF	#000000	##FFFFFF
##3577B1	1.00	4.75	4.43	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D79B3

Deuteranopia (green-blind)

#4C6EB0

Tritanopia (blue-blind)

#00858C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3577b1;
/* rgb */ color: rgb(53, 119, 177);
/* oklch */ color: oklch(55.4% 0.113 248.0);

Tailwind

colors: {
  custom: {
    50: '#7b9dc8',
    500: '#3577b1',
    950: '#000000',
  },
}

SCSS

$custom: #3577b1;
$custom-light: #7b9dc8;
$custom-dark: #000000;

JSON

{
  "hex": "#3577b1",
  "rgb": {
    "r": 53,
    "g": 119,
    "b": 177
  },
  "hsl": {
    "h": 208.065,
    "s": 53.913,
    "l": 45.098
  },
  "oklch": {
    "l": 0.55384,
    "c": 0.11266,
    "h": 248
  },
  "luminance": 0.17125
}

Semantic roles & 50–950 ramp

primary

#3577B1

secondary

#C49F7D

accent

#8F4BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #3577B1

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

Preview Lab → · Contrast checker → · Palette generator →