#4291E0#4291E0

#4291E0 is a light, vivid cyan. Relative luminance 0.268; OKLCH L 64.4% C 0.142 H 251.0°. Best body text is #000000 at 6.36:1 contrast (WCAG AA passes).

Color values

HEX#4291E0
RGBrgb(66, 145, 224)
HSLhsl(210, 72%, 57%)
HSVhsv(210, 71%, 88%)
CMYKcmyk(70.5%, 35.3%, 0%, 12.2%)
CIE-LABlab(58.78, 1.51, -47.16)
CIE-LCHlch(58.78, 47.19, 271.84°)
OKLaboklab(64.41% -0.0462 -0.134)
OKLCHoklch(64.41% 0.142 251)
XYZxyz(25.8217, 26.7880, 74.3163)
Luminance0.2679 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4291E0 #E09142
analogous
#42E0E0 #4291E0 #4242E0
triadic
#4291E0 #E04291 #91E042
tetradic
#4291E0 #E042E0 #E09142 #42E042
square
#4291E0 #E042E0 #E09142 #42E042
split-complementary
#4291E0 #E04242 #E0E042
monochromatic
#185490 #2072C5 #4291E0 #77B0E9 #ABCEF1

Accessibility & contrast

On white

3.30
#4291E0 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.36
#4291E0 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4291E0
6.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4291E0#FFFFFF#000000##000000
##4291E01.003.306.366.36
#FFFFFF3.301.0021.0021.00
#0000006.3621.001.001.00
##0000006.3621.001.001.00

Color blindness preview

Protanopia (red-blind)
#6D96E3
Deuteranopia (green-blind)
#5687DE
Tritanopia (blue-blind)
#00A4AE
Achromatopsia (no color)
#8D8D8D

Design tokens & code

CSS
--color: #4291e0;
/* rgb */ color: rgb(66, 145, 224);
/* oklch */ color: oklch(64.4% 0.142 251.0);
Tailwind
colors: {
  custom: {
    50: '#88b0ea',
    500: '#4291e0',
    950: '#000000',
  },
}
SCSS
$custom: #4291e0;
$custom-light: #88b0ea;
$custom-dark: #000000;
JSON
{
  "hex": "#4291e0",
  "rgb": {
    "r": 66,
    "g": 145,
    "b": 224
  },
  "hsl": {
    "h": 210,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.64414,
    "c": 0.14178,
    "h": 251
  },
  "luminance": 0.26791
}

Semantic roles & 50–950 ramp

primary
#4291E0
secondary
#DFBF9F
accent
#9439EF
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1016
muted
#7E7F84

Preview Lab

Preview with #4291E0

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

Preview Lab → · Contrast checker → · Palette generator →

#4291E0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva