#428AD9#428AD9

#428AD9 is a light, vivid cyan. Relative luminance 0.243; OKLCH L 62.5% C 0.140 H 252.8°. Best body text is #000000 at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#428AD9
RGB	rgb(66, 138, 217)
HSL	hsl(211, 67%, 55%)
HSV	hsv(211, 70%, 85%)
CMYK	cmyk(69.6%, 36.4%, 0%, 14.9%)
CIE-LAB	lab(56.43, 3.20, -46.97)
CIE-LCH	lch(56.43, 47.08, 273.89°)
OKLab	oklab(62.46% -0.0414 -0.1336)
OKLCH	oklch(62.46% 0.14 252.8)
XYZ	xyz(23.8550, 24.3424, 69.0735)
Luminance	0.2434 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AD9 #D99142

analogous

#42D5D9 #428AD9 #4542D9

triadic

#428AD9 #D9428A #8AD942

tetradic

#428AD9 #D942D5 #D99142 #42D945

square

#428AD9 #D942D5 #D99142 #42D945

split-complementary

#428AD9 #D94542 #D5D942

monochromatic

#1B4E86 #256BB9 #428AD9 #75AAE3 #A8C9ED

Accessibility & contrast

On white

3.58

#428AD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.87

#428AD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AD9

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AD9	#FFFFFF	#000000	##000000
##428AD9	1.00	3.58	5.87	5.87
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.87	21.00	1.00	1.00
##000000	5.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#668FDC

Deuteranopia (green-blind)

#5081D7

Tritanopia (blue-blind)

#009CA7

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428ad9;
/* rgb */ color: rgb(66, 138, 217);
/* oklch */ color: oklch(62.5% 0.140 252.8);

Tailwind

colors: {
  custom: {
    50: '#87abe5',
    500: '#428ad9',
    950: '#000000',
  },
}

SCSS

$custom: #428ad9;
$custom-light: #87abe5;
$custom-dark: #000000;

JSON

{
  "hex": "#428ad9",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 217
  },
  "hsl": {
    "h": 211.391,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.62459,
    "c": 0.13984,
    "h": 252.8
  },
  "luminance": 0.24345
}

Semantic roles & 50–950 ramp

primary

#428AD9

secondary

#DBBD9C

accent

#983EE9

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0D1016

muted

#7D7F84

Preview Lab

Preview with #428AD9

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

Preview Lab → · Contrast checker → · Palette generator →