#428CE4#428CE4

#428CE4 is a light, vivid cyan. Relative luminance 0.255; OKLCH L 63.5% C 0.152 H 254.5°. Best body text is #000000 at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#428CE4
RGB	rgb(66, 140, 228)
HSL	hsl(213, 75%, 58%)
HSV	hsv(213, 71%, 89%)
CMYK	cmyk(71.1%, 38.6%, 0%, 10.6%)
CIE-LAB	lab(57.57, 5.88, -51.31)
CIE-LCH	lch(57.57, 51.64, 276.54°)
OKLab	oklab(63.54% -0.0406 -0.1462)
OKLCH	oklch(63.54% 0.152 254.5)
XYZ	xyz(25.6233, 25.5131, 76.9579)
Luminance	0.2552 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CE4 #E49A42

analogous

#42DDE4 #428CE4 #4942E4

triadic

#428CE4 #E4428C #8CE442

tetradic

#428CE4 #E442DD #E49A42 #42E449

square

#428CE4 #E442DD #E49A42 #42E449

split-complementary

#428CE4 #E44942 #DDE442

monochromatic

#155096 #1D6DCC #428CE4 #78ADEC #ADCDF3

Accessibility & contrast

On white

3.44

#428CE4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.10

#428CE4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE4

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CE4	#FFFFFF	#000000	##000000
##428CE4	1.00	3.44	6.10	6.10
#FFFFFF	3.44	1.00	21.00	21.00
#000000	6.10	21.00	1.00	1.00
##000000	6.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6392E8

Deuteranopia (green-blind)

#4A83E2

Tritanopia (blue-blind)

#00A1AD

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428ce4;
/* rgb */ color: rgb(66, 140, 228);
/* oklch */ color: oklch(63.5% 0.152 254.5);

Tailwind

colors: {
  custom: {
    50: '#89aded',
    500: '#428ce4',
    950: '#000000',
  },
}

SCSS

$custom: #428ce4;
$custom-light: #89aded;
$custom-dark: #000000;

JSON

{
  "hex": "#428ce4",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 228
  },
  "hsl": {
    "h": 212.593,
    "s": 75,
    "l": 57.647
  },
  "oklch": {
    "l": 0.63539,
    "c": 0.15177,
    "h": 254.5
  },
  "luminance": 0.25516
}

Semantic roles & 50–950 ramp

primary

#428CE4

secondary

#E2C4A0

accent

#9C36F2

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428CE4

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

Preview Lab → · Contrast checker → · Palette generator →