#428AE4#428AE4

#428AE4 is a light, vivid cyan. Relative luminance 0.249; OKLCH L 63.1% C 0.154 H 255.4°. Best body text is #000000 at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#428AE4
RGB	rgb(66, 138, 228)
HSL	hsl(213, 75%, 58%)
HSV	hsv(213, 71%, 89%)
CMYK	cmyk(71.1%, 39.5%, 0%, 10.6%)
CIE-LAB	lab(57.01, 7.08, -52.20)
CIE-LCH	lch(57.01, 52.68, 277.72°)
OKLab	oklab(63.1% -0.0388 -0.1489)
OKLCH	oklch(63.1% 0.154 255.4)
XYZ	xyz(25.3337, 24.9339, 76.8613)
Luminance	0.2494 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AE4 #E49C42

analogous

#42DBE4 #428AE4 #4B42E4

triadic

#428AE4 #E4428A #8AE442

tetradic

#428AE4 #E442DB #E49C42 #42E44B

square

#428AE4 #E442DB #E49C42 #42E44B

split-complementary

#428AE4 #E44B42 #DBE442

monochromatic

#154F96 #1D6BCC #428AE4 #78ABEC #ADCCF3

Accessibility & contrast

On white

3.51

#428AE4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.99

#428AE4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AE4

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AE4	#FFFFFF	#000000	##000000
##428AE4	1.00	3.51	5.99	5.99
#FFFFFF	3.51	1.00	21.00	21.00
#000000	5.99	21.00	1.00	1.00
##000000	5.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6091E8

Deuteranopia (green-blind)

#4682E2

Tritanopia (blue-blind)

#009FAC

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428ae4;
/* rgb */ color: rgb(66, 138, 228);
/* oklch */ color: oklch(63.1% 0.154 255.4);

Tailwind

colors: {
  custom: {
    50: '#89abed',
    500: '#428ae4',
    950: '#000000',
  },
}

SCSS

$custom: #428ae4;
$custom-light: #89abed;
$custom-dark: #000000;

JSON

{
  "hex": "#428ae4",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 228
  },
  "hsl": {
    "h": 213.333,
    "s": 75,
    "l": 57.647
  },
  "oklch": {
    "l": 0.63102,
    "c": 0.15386,
    "h": 255.4
  },
  "luminance": 0.24937
}

Semantic roles & 50–950 ramp

primary

#428AE4

secondary

#E2C5A0

accent

#9E36F2

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428AE4

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

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