#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
RGB	rgb(66, 144, 228)
HSL	hsl(211, 75%, 58%)
HSV	hsv(211, 71%, 89%)
CMYK	cmyk(71.1%, 36.8%, 0%, 10.6%)
CIE-LAB	lab(58.70, 3.50, -49.52)
CIE-LCH	lch(58.70, 49.64, 274.05°)
OKLab	oklab(64.42% -0.0443 -0.1409)
OKLCH	oklch(64.42% 0.148 252.6)
XYZ	xyz(26.2184, 26.7033, 77.1562)
Luminance	0.2671 (WCAG relative)
Temperature	cool
Family	cyan

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
##4290E4	1.00	3.31	6.34	6.34
#FFFFFF	3.31	1.00	21.00	21.00
#000000	6.34	21.00	1.00	1.00
##000000	6.34	21.00	1.00	1.00

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 →