#3578B8#3578B8

#3578B8 is a mid, vivid cyan. Relative luminance 0.177; OKLCH L 56.0% C 0.121 H 250.0°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3578B8
RGB	rgb(53, 120, 184)
HSL	hsl(209, 55%, 46%)
HSV	hsv(209, 71%, 72%)
CMYK	cmyk(71.2%, 34.8%, 0%, 27.8%)
CIE-LAB	lab(49.07, 0.33, -39.88)
CIE-LCH	lch(49.07, 39.88, 270.47°)
OKLab	oklab(56.01% -0.0413 -0.1132)
OKLCH	oklch(56.01% 0.121 250)
XYZ	xyz(16.8332, 17.6487, 47.8575)
Luminance	0.1765 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3578B8 #B87535

analogous

#35B8B7 #3578B8 #3537B8

triadic

#3578B8 #B83578 #78B835

tetradic

#3578B8 #B735B8 #B87535 #37B835

square

#3578B8 #B735B8 #B87535 #37B835

split-complementary

#3578B8 #B83537 #B8B735

monochromatic

#1A3A59 #275988 #3578B8 #5B96D0 #8AB5DD

Accessibility & contrast

On white

4.64

#3578B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3578B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3578B8

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3578B8	#FFFFFF	#000000	##FFFFFF
##3578B8	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7BBB

Deuteranopia (green-blind)

#486FB7

Tritanopia (blue-blind)

#00878F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3578b8;
/* rgb */ color: rgb(53, 120, 184);
/* oklch */ color: oklch(56.0% 0.121 250.0);

Tailwind

colors: {
  custom: {
    50: '#7c9ecd',
    500: '#3578b8',
    950: '#000000',
  },
}

SCSS

$custom: #3578b8;
$custom-light: #7c9ecd;
$custom-dark: #000000;

JSON

{
  "hex": "#3578b8",
  "rgb": {
    "r": 53,
    "g": 120,
    "b": 184
  },
  "hsl": {
    "h": 209.313,
    "s": 55.274,
    "l": 46.471
  },
  "oklch": {
    "l": 0.56013,
    "c": 0.12053,
    "h": 250
  },
  "luminance": 0.17651
}

Semantic roles & 50–950 ramp

primary

#3578B8

secondary

#C7A481

accent

#9249DF

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3578B8

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

Preview Lab → · Contrast checker → · Palette generator →