#428FEB#428FEB

#428FEB is a light, vivid cyan. Relative luminance 0.268; OKLCH L 64.6% C 0.158 H 254.6°. Best body text is #000000 at 6.36:1 contrast (WCAG AA passes).

Color values

HEX	#428FEB
RGB	rgb(66, 143, 235)
HSL	hsl(213, 81%, 59%)
HSV	hsv(213, 72%, 92%)
CMYK	cmyk(71.9%, 39.1%, 0%, 7.8%)
CIE-LAB	lab(58.79, 6.57, -53.26)
CIE-LCH	lch(58.79, 53.66, 277.03°)
OKLab	oklab(64.61% -0.0417 -0.1519)
OKLCH	oklch(64.61% 0.158 254.6)
XYZ	xyz(27.0591, 26.7983, 82.3277)
Luminance	0.2680 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FEB #EB9E42

analogous

#42E3EB #428FEB #4A42EB

triadic

#428FEB #EB428F #8FEB42

tetradic

#428FEB #EB42E3 #EB9E42 #42EB4A

square

#428FEB #EB42E3 #EB9E42 #42EB4A

split-complementary

#428FEB #EB4A42 #E3EB42

monochromatic

#1153A2 #176FD9 #428FEB #79B0F1 #B1D1F7

Accessibility & contrast

On white

3.30

#428FEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.36

#428FEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FEB

6.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FEB	#FFFFFF	#000000	##000000
##428FEB	1.00	3.30	6.36	6.36
#FFFFFF	3.30	1.00	21.00	21.00
#000000	6.36	21.00	1.00	1.00
##000000	6.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6496EF

Deuteranopia (green-blind)

#4986E9

Tritanopia (blue-blind)

#00A5B2

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #428feb;
/* rgb */ color: rgb(66, 143, 235);
/* oklch */ color: oklch(64.6% 0.158 254.6);

Tailwind

colors: {
  custom: {
    50: '#8aaff2',
    500: '#428feb',
    950: '#000000',
  },
}

SCSS

$custom: #428feb;
$custom-light: #8aaff2;
$custom-dark: #000000;

JSON

{
  "hex": "#428feb",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 235
  },
  "hsl": {
    "h": 212.663,
    "s": 80.861,
    "l": 59.02
  },
  "oklch": {
    "l": 0.64608,
    "c": 0.15755,
    "h": 254.6
  },
  "luminance": 0.26801
}

Semantic roles & 50–950 ramp

primary

#428FEB

secondary

#E6C7A3

accent

#9D31F7

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0D1017

muted

#7E7F85

Preview Lab

Preview with #428FEB

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

Preview Lab → · Contrast checker → · Palette generator →