#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
RGBrgb(53, 120, 203)
HSLhsl(213, 59%, 50%)
HSVhsv(213, 74%, 80%)
CMYKcmyk(73.9%, 40.9%, 0%, 20.4%)
CIE-LABlab(50.10, 7.25, -49.15)
CIE-LCHlch(50.10, 49.68, 278.39°)
OKLaboklab(57.15% -0.0366 -0.1404)
OKLCHoklch(57.15% 0.145 255.4)
XYZxyz(18.9602, 18.4995, 59.0598)
Luminance0.1850 (WCAG relative)
Temperaturecool
Familycyan

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
##3578CB1.004.474.704.70
#FFFFFF4.471.0021.0021.00
#0000004.7021.001.001.00
##0000004.7021.001.001.00

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 →

#3578CB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva