#4290EB#4290EB

#4290EB is a light, vivid cyan. Relative luminance 0.271; OKLCH L 64.8% C 0.157 H 254.2°. Best body text is #000000 at 6.42:1 contrast (WCAG AA passes).

Color values

HEX#4290EB
RGBrgb(66, 144, 235)
HSLhsl(212, 81%, 59%)
HSVhsv(212, 72%, 92%)
CMYKcmyk(71.9%, 38.7%, 0%, 7.8%)
CIE-LABlab(59.07, 5.97, -52.82)
CIE-LCHlch(59.07, 53.15, 276.45°)
OKLaboklab(64.83% -0.0426 -0.1506)
OKLCHoklch(64.83% 0.157 254.2)
XYZxyz(27.2099, 27.0999, 82.3779)
Luminance0.2710 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4290EB #EB9D42
analogous
#42E4EB #4290EB #4942EB
triadic
#4290EB #EB4290 #90EB42
tetradic
#4290EB #EB42E4 #EB9D42 #42EB49
square
#4290EB #EB42E4 #EB9D42 #42EB49
split-complementary
#4290EB #EB4942 #E4EB42
monochromatic
#1154A2 #1770D9 #4290EB #79B1F1 #B1D1F7

Accessibility & contrast

On white

3.27
#4290EB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.42
#4290EB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290EB
6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4290EB#FFFFFF#000000##000000
##4290EB1.003.276.426.42
#FFFFFF3.271.0021.0021.00
#0000006.4221.001.001.00
##0000006.4221.001.001.00

Color blindness preview

Protanopia (red-blind)
#6697EF
Deuteranopia (green-blind)
#4B87E9
Tritanopia (blue-blind)
#00A5B2
Achromatopsia (no color)
#8E8E8E

Design tokens & code

CSS
--color: #4290eb;
/* rgb */ color: rgb(66, 144, 235);
/* oklch */ color: oklch(64.8% 0.157 254.2);
Tailwind
colors: {
  custom: {
    50: '#8ab0f2',
    500: '#4290eb',
    950: '#000000',
  },
}
SCSS
$custom: #4290eb;
$custom-light: #8ab0f2;
$custom-dark: #000000;
JSON
{
  "hex": "#4290eb",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 235
  },
  "hsl": {
    "h": 212.308,
    "s": 80.861,
    "l": 59.02
  },
  "oklch": {
    "l": 0.64826,
    "c": 0.15652,
    "h": 254.2
  },
  "luminance": 0.27103
}

Semantic roles & 50–950 ramp

primary
#4290EB
secondary
#E6C7A3
accent
#9C31F7
background
#F9FAFE
surface
#F2F4FD
border
#CCCED5
text
#0D1017
muted
#7E7F85

Preview Lab

Preview with #4290EB

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

Preview Lab → · Contrast checker → · Palette generator →

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