#3577B5#3577B5

#3577B5 is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.6% C 0.118 H 249.5°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#3577B5
RGB	rgb(53, 119, 181)
HSL	hsl(209, 55%, 46%)
HSV	hsv(209, 71%, 71%)
CMYK	cmyk(70.7%, 34.3%, 0%, 29%)
CIE-LAB	lab(48.62, -0.15, -38.86)
CIE-LCH	lch(48.62, 38.86, 269.78°)
OKLab	oklab(55.61% -0.0411 -0.1103)
OKLCH	oklch(55.61% 0.118 249.5)
XYZ	xyz(16.4024, 17.2850, 46.1790)
Luminance	0.1729 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3577B5 #B57335

analogous

#35B5B3 #3577B5 #3537B5

triadic

#3577B5 #B53577 #77B535

tetradic

#3577B5 #B335B5 #B57335 #37B535

square

#3577B5 #B335B5 #B57335 #37B535

split-complementary

#3577B5 #B53537 #B5B335

monochromatic

#193956 #275886 #3577B5 #5995CE #88B4DC

Accessibility & contrast

On white

4.71

#3577B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#3577B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3577B5

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3577B5	#FFFFFF	#000000	##FFFFFF
##3577B5	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7AB8

Deuteranopia (green-blind)

#496EB4

Tritanopia (blue-blind)

#00868D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3577b5;
/* rgb */ color: rgb(53, 119, 181);
/* oklch */ color: oklch(55.6% 0.118 249.5);

Tailwind

colors: {
  custom: {
    50: '#7c9dcb',
    500: '#3577b5',
    950: '#000000',
  },
}

SCSS

$custom: #3577b5;
$custom-light: #7c9dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3577b5",
  "rgb": {
    "r": 53,
    "g": 119,
    "b": 181
  },
  "hsl": {
    "h": 209.063,
    "s": 54.701,
    "l": 45.882
  },
  "oklch": {
    "l": 0.55609,
    "c": 0.11769,
    "h": 249.5
  },
  "luminance": 0.17287
}

Semantic roles & 50–950 ramp

primary

#3577B5

secondary

#C6A280

accent

#924ADE

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3577B5

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

Preview Lab → · Contrast checker → · Palette generator →