#3578CB#3578CB

#3578CB is a mid, vivid cyan. Relative luminance 0.185; OKLCH L 57.2% C 0.145 H 255.4°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3578CB
RGB	rgb(53, 120, 203)
HSL	hsl(213, 59%, 50%)
HSV	hsv(213, 74%, 80%)
CMYK	cmyk(73.9%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.10, 7.25, -49.15)
CIE-LCH	lch(50.10, 49.68, 278.39°)
OKLab	oklab(57.15% -0.0366 -0.1404)
OKLCH	oklch(57.15% 0.145 255.4)
XYZ	xyz(18.9602, 18.4995, 59.0598)
Luminance	0.1850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3578CB #CB8835

analogous

#35C3CB #3578CB #3D35CB

triadic

#3578CB #CB3578 #78CB35

tetradic

#3578CB #CB35C3 #CB8835 #35CB3D

square

#3578CB #CB35C3 #CB8835 #35CB3D

split-complementary

#3578CB #CB3D35 #C3CB35

monochromatic

#1B3F6A #285B9B #3578CB #6699D8 #96B9E4

Accessibility & contrast

On white

4.47

#3578CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3578CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3578CB

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3578CB	#FFFFFF	#000000	##000000
##3578CB	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507FCE

Deuteranopia (green-blind)

#3771C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3578cb;
/* rgb */ color: rgb(53, 120, 203);
/* oklch */ color: oklch(57.2% 0.145 255.4);

Tailwind

colors: {
  custom: {
    50: '#809edb',
    500: '#3578cb',
    950: '#000000',
  },
}

SCSS

$custom: #3578cb;
$custom-light: #809edb;
$custom-dark: #000000;

JSON

{
  "hex": "#3578cb",
  "rgb": {
    "r": 53,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 213.2,
    "s": 59.055,
    "l": 50.196
  },
  "oklch": {
    "l": 0.57152,
    "c": 0.14509,
    "h": 255.4
  },
  "luminance": 0.18502
}

Semantic roles & 50–950 ramp

primary

#3578CB

secondary

#CFB18C

accent

#9C46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3578CB

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

Preview Lab → · Contrast checker → · Palette generator →