#428AD8#428AD8

#428AD8 is a light, vivid cyan. Relative luminance 0.243; OKLCH L 62.4% C 0.139 H 252.5°. Best body text is #000000 at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#428AD8
RGB	rgb(66, 138, 216)
HSL	hsl(211, 66%, 55%)
HSV	hsv(211, 69%, 85%)
CMYK	cmyk(69.4%, 36.1%, 0%, 15.3%)
CIE-LAB	lab(56.38, 2.85, -46.49)
CIE-LCH	lch(56.38, 46.58, 273.50°)
OKLab	oklab(62.4% -0.0416 -0.1322)
OKLCH	oklch(62.4% 0.139 252.5)
XYZ	xyz(23.7253, 24.2905, 68.3906)
Luminance	0.2429 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AD8 #D89042

analogous

#42D5D8 #428AD8 #4542D8

triadic

#428AD8 #D8428A #8AD842

tetradic

#428AD8 #D842D5 #D89042 #42D845

square

#428AD8 #D842D5 #D89042 #42D845

split-complementary

#428AD8 #D84542 #D5D842

monochromatic

#1B4E84 #266BB7 #428AD8 #75A9E2 #A7C9ED

Accessibility & contrast

On white

3.58

#428AD8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.86

#428AD8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AD8

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AD8	#FFFFFF	#000000	##000000
##428AD8	1.00	3.58	5.86	5.86
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.86	21.00	1.00	1.00
##000000	5.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#678FDB

Deuteranopia (green-blind)

#5181D6

Tritanopia (blue-blind)

#009CA7

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428ad8;
/* rgb */ color: rgb(66, 138, 216);
/* oklch */ color: oklch(62.4% 0.139 252.5);

Tailwind

colors: {
  custom: {
    50: '#87abe4',
    500: '#428ad8',
    950: '#000000',
  },
}

SCSS

$custom: #428ad8;
$custom-light: #87abe4;
$custom-dark: #000000;

JSON

{
  "hex": "#428ad8",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 216
  },
  "hsl": {
    "h": 211.2,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.62402,
    "c": 0.13857,
    "h": 252.5
  },
  "luminance": 0.24293
}

Semantic roles & 50–950 ramp

primary

#428AD8

secondary

#DABC9C

accent

#973FE9

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0D1015

muted

#7D7F84

Preview Lab

Preview with #428AD8

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

Preview Lab → · Contrast checker → · Palette generator →