#4290E9#4290E9

#4290E9 is a light, vivid cyan. Relative luminance 0.270; OKLCH L 64.7% C 0.154 H 253.8°. Best body text is #000000 at 6.40:1 contrast (WCAG AA passes).

Color values

HEX#4290E9
RGBrgb(66, 144, 233)
HSLhsl(212, 79%, 59%)
HSVhsv(212, 72%, 91%)
CMYKcmyk(71.7%, 38.2%, 0%, 8.6%)
CIE-LABlab(58.96, 5.26, -51.88)
CIE-LCHlch(58.96, 52.14, 275.79°)
OKLaboklab(64.71% -0.0431 -0.1478)
OKLCHoklch(64.71% 0.154 253.8)
XYZxyz(26.9226, 26.9850, 80.8647)
Luminance0.2699 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4290E9 #E99B42
analogous
#42E3E9 #4290E9 #4742E9
triadic
#4290E9 #E94290 #90E942
tetradic
#4290E9 #E942E3 #E99B42 #42E947
square
#4290E9 #E942E3 #E99B42 #42E947
split-complementary
#4290E9 #E94742 #E3E942
monochromatic
#12549E #1971D5 #4290E9 #79B0EF #B0D0F6

Accessibility & contrast

On white

3.28
#4290E9 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.40
#4290E9 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290E9
6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4290E9#FFFFFF#000000##000000
##4290E91.003.286.406.40
#FFFFFF3.281.0021.0021.00
#0000006.4021.001.001.00
##0000006.4021.001.001.00

Color blindness preview

Protanopia (red-blind)
#6796ED
Deuteranopia (green-blind)
#4D87E7
Tritanopia (blue-blind)
#00A5B1
Achromatopsia (no color)
#8E8E8E

Design tokens & code

CSS
--color: #4290e9;
/* rgb */ color: rgb(66, 144, 233);
/* oklch */ color: oklch(64.7% 0.154 253.8);
Tailwind
colors: {
  custom: {
    50: '#8ab0f0',
    500: '#4290e9',
    950: '#000000',
  },
}
SCSS
$custom: #4290e9;
$custom-light: #8ab0f0;
$custom-dark: #000000;
JSON
{
  "hex": "#4290e9",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 233
  },
  "hsl": {
    "h": 211.976,
    "s": 79.147,
    "l": 58.627
  },
  "oklch": {
    "l": 0.64708,
    "c": 0.154,
    "h": 253.8
  },
  "luminance": 0.26988
}

Semantic roles & 50–950 ramp

primary
#4290E9
secondary
#E4C6A2
accent
#9A32F6
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1017
muted
#7E7F85

Preview Lab

Preview with #4290E9

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

Preview Lab → · Contrast checker → · Palette generator →

#4290E9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva