#4290E4#4290E4

#4290E4 is a light, vivid cyan. Relative luminance 0.267; OKLCH L 64.4% C 0.148 H 252.6°. Best body text is #000000 at 6.34:1 contrast (WCAG AA passes).

Color values

HEX#4290E4
RGBrgb(66, 144, 228)
HSLhsl(211, 75%, 58%)
HSVhsv(211, 71%, 89%)
CMYKcmyk(71.1%, 36.8%, 0%, 10.6%)
CIE-LABlab(58.70, 3.50, -49.52)
CIE-LCHlch(58.70, 49.64, 274.05°)
OKLaboklab(64.42% -0.0443 -0.1409)
OKLCHoklch(64.42% 0.148 252.6)
XYZxyz(26.2184, 26.7033, 77.1562)
Luminance0.2671 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4290E4 #E49642
analogous
#42E1E4 #4290E4 #4542E4
triadic
#4290E4 #E44290 #90E442
tetradic
#4290E4 #E442E1 #E49642 #42E445
square
#4290E4 #E442E1 #E49642 #42E445
split-complementary
#4290E4 #E44542 #E1E442
monochromatic
#155396 #1D71CC #4290E4 #78AFEC #ADCFF3

Accessibility & contrast

On white

3.31
#4290E4 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.34
#4290E4 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290E4
6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4290E4#FFFFFF#000000##000000
##4290E41.003.316.346.34
#FFFFFF3.311.0021.0021.00
#0000006.3421.001.001.00
##0000006.3421.001.001.00

Color blindness preview

Protanopia (red-blind)
#6A95E7
Deuteranopia (green-blind)
#5186E2
Tritanopia (blue-blind)
#00A4AF
Achromatopsia (no color)
#8D8D8D

Design tokens & code

CSS
--color: #4290e4;
/* rgb */ color: rgb(66, 144, 228);
/* oklch */ color: oklch(64.4% 0.148 252.6);
Tailwind
colors: {
  custom: {
    50: '#89b0ed',
    500: '#4290e4',
    950: '#000000',
  },
}
SCSS
$custom: #4290e4;
$custom-light: #89b0ed;
$custom-dark: #000000;
JSON
{
  "hex": "#4290e4",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 228
  },
  "hsl": {
    "h": 211.111,
    "s": 75,
    "l": 57.647
  },
  "oklch": {
    "l": 0.64419,
    "c": 0.14773,
    "h": 252.6
  },
  "luminance": 0.26706
}

Semantic roles & 50–950 ramp

primary
#4290E4
secondary
#E2C2A0
accent
#9736F2
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1016
muted
#7E7F84

Preview Lab

Preview with #4290E4

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

Preview Lab → · Contrast checker → · Palette generator →

#4290E4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva