#4290E0#4290E0

#4290E0 is a light, vivid cyan. Relative luminance 0.265; OKLCH L 64.2% C 0.143 H 251.5°. Best body text is #000000 at 6.30:1 contrast (WCAG AA passes).

Color values

HEX	#4290E0
RGB	rgb(66, 144, 224)
HSL	hsl(210, 72%, 57%)
HSV	hsv(210, 71%, 88%)
CMYK	cmyk(70.5%, 35.7%, 0%, 12.2%)
CIE-LAB	lab(58.49, 2.10, -47.61)
CIE-LCH	lch(58.49, 47.66, 272.53°)
OKLab	oklab(64.19% -0.0453 -0.1354)
OKLCH	oklch(64.19% 0.143 251.5)
XYZ	xyz(25.6696, 26.4838, 74.2656)
Luminance	0.2649 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290E0 #E09242

analogous

#42DFE0 #4290E0 #4342E0

triadic

#4290E0 #E04290 #90E042

tetradic

#4290E0 #E042DF #E09242 #42E043

square

#4290E0 #E042DF #E09242 #42E043

split-complementary

#4290E0 #E04342 #DFE042

monochromatic

#185390 #2071C5 #4290E0 #77AFE9 #ABCEF1

Accessibility & contrast

On white

3.33

#4290E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.30

#4290E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290E0

6.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290E0	#FFFFFF	#000000	##000000
##4290E0	1.00	3.33	6.30	6.30
#FFFFFF	3.33	1.00	21.00	21.00
#000000	6.30	21.00	1.00	1.00
##000000	6.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C95E3

Deuteranopia (green-blind)

#5586DE

Tritanopia (blue-blind)

#00A3AD

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #4290e0;
/* rgb */ color: rgb(66, 144, 224);
/* oklch */ color: oklch(64.2% 0.143 251.5);

Tailwind

colors: {
  custom: {
    50: '#88b0ea',
    500: '#4290e0',
    950: '#000000',
  },
}

SCSS

$custom: #4290e0;
$custom-light: #88b0ea;
$custom-dark: #000000;

JSON

{
  "hex": "#4290e0",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 224
  },
  "hsl": {
    "h": 210.38,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.64191,
    "c": 0.14274,
    "h": 251.5
  },
  "luminance": 0.26487
}

Semantic roles & 50–950 ramp

primary

#4290E0

secondary

#DFBF9F

accent

#9539EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4290E0

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

Preview Lab → · Contrast checker → · Palette generator →