#4290D4#4290D4

#4290D4 is a light, vivid cyan. Relative luminance 0.259; OKLCH L 63.5% C 0.128 H 247.7°. Best body text is #000000 at 6.17:1 contrast (WCAG AA passes).

Color values

HEX	#4290D4
RGB	rgb(66, 144, 212)
HSL	hsl(208, 63%, 55%)
HSV	hsv(208, 69%, 83%)
CMYK	cmyk(68.9%, 32.1%, 0%, 16.9%)
CIE-LAB	lab(57.90, -2.07, -41.84)
CIE-LCH	lch(57.90, 41.89, 267.17°)
OKLab	oklab(63.53% -0.0485 -0.1185)
OKLCH	oklch(63.53% 0.128 247.7)
XYZ	xyz(24.0992, 25.8557, 65.9952)
Luminance	0.2586 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290D4 #D48642

analogous

#42D4CF #4290D4 #4247D4

triadic

#4290D4 #D44290 #90D442

tetradic

#4290D4 #CF42D4 #D48642 #47D442

square

#4290D4 #CF42D4 #D48642 #47D442

split-complementary

#4290D4 #D44247 #D4CF42

monochromatic

#1D517F #2871B1 #4290D4 #74ADDF #A6CBEB

Accessibility & contrast

On white

3.40

#4290D4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.17

#4290D4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290D4

6.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290D4	#FFFFFF	#000000	##000000
##4290D4	1.00	3.40	6.17	6.17
#FFFFFF	3.40	1.00	21.00	21.00
#000000	6.17	21.00	1.00	1.00
##000000	6.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7293D7

Deuteranopia (green-blind)

#5D85D3

Tritanopia (blue-blind)

#00A0A8

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #4290d4;
/* rgb */ color: rgb(66, 144, 212);
/* oklch */ color: oklch(63.5% 0.128 247.7);

Tailwind

colors: {
  custom: {
    50: '#86b0e1',
    500: '#4290d4',
    950: '#000000',
  },
}

SCSS

$custom: #4290d4;
$custom-light: #86b0e1;
$custom-dark: #000000;

JSON

{
  "hex": "#4290d4",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 212
  },
  "hsl": {
    "h": 207.945,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.63531,
    "c": 0.12806,
    "h": 247.7
  },
  "luminance": 0.25858
}

Semantic roles & 50–950 ramp

primary

#4290D4

secondary

#D8B79A

accent

#8E42E6

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4290D4

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

Preview Lab → · Contrast checker → · Palette generator →