#428CE8#428CE8

#428CE8 is a light, vivid cyan. Relative luminance 0.257; OKLCH L 63.8% C 0.157 H 255.3°. Best body text is #000000 at 6.15:1 contrast (WCAG AA passes).

Color values

HEX	#428CE8
RGB	rgb(66, 140, 232)
HSL	hsl(213, 78%, 58%)
HSV	hsv(213, 72%, 91%)
CMYK	cmyk(71.6%, 39.7%, 0%, 9%)
CIE-LAB	lab(57.79, 7.29, -53.19)
CIE-LCH	lch(57.79, 53.69, 277.81°)
OKLab	oklab(63.78% -0.0397 -0.1518)
OKLCH	oklch(63.78% 0.157 255.3)
XYZ	xyz(26.1850, 25.7377, 79.9162)
Luminance	0.2574 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CE8 #E89E42

analogous

#42DFE8 #428CE8 #4B42E8

triadic

#428CE8 #E8428C #8CE842

tetradic

#428CE8 #E842DF #E89E42 #42E84B

square

#428CE8 #E842DF #E89E42 #42E84B

split-complementary

#428CE8 #E84B42 #DFE842

monochromatic

#13509D #1A6CD3 #428CE8 #79ADEF #AFCEF5

Accessibility & contrast

On white

3.42

#428CE8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.15

#428CE8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE8

6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CE8	#FFFFFF	#000000	##000000
##428CE8	1.00	3.42	6.15	6.15
#FFFFFF	3.42	1.00	21.00	21.00
#000000	6.15	21.00	1.00	1.00
##000000	6.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6193EC

Deuteranopia (green-blind)

#4684E6

Tritanopia (blue-blind)

#00A2AF

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #428ce8;
/* rgb */ color: rgb(66, 140, 232);
/* oklch */ color: oklch(63.8% 0.157 255.3);

Tailwind

colors: {
  custom: {
    50: '#8aadf0',
    500: '#428ce8',
    950: '#000000',
  },
}

SCSS

$custom: #428ce8;
$custom-light: #8aadf0;
$custom-dark: #000000;

JSON

{
  "hex": "#428ce8",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 232
  },
  "hsl": {
    "h": 213.253,
    "s": 78.302,
    "l": 58.431
  },
  "oklch": {
    "l": 0.63777,
    "c": 0.15687,
    "h": 255.3
  },
  "luminance": 0.25741
}

Semantic roles & 50–950 ramp

primary

#428CE8

secondary

#E4C6A2

accent

#9E33F5

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428CE8

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

Preview Lab → · Contrast checker → · Palette generator →