#428BE2#428BE2

#428BE2 is a light, vivid cyan. Relative luminance 0.251; OKLCH L 63.2% C 0.150 H 254.5°. Best body text is #000000 at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#428BE2
RGB	rgb(66, 139, 226)
HSL	hsl(213, 73%, 57%)
HSV	hsv(213, 71%, 89%)
CMYK	cmyk(70.8%, 38.5%, 0%, 11.4%)
CIE-LAB	lab(57.18, 5.77, -50.81)
CIE-LCH	lch(57.18, 51.13, 276.48°)
OKLab	oklab(63.2% -0.0402 -0.1448)
OKLCH	oklch(63.2% 0.15 254.5)
XYZ	xyz(25.2018, 25.1117, 75.4556)
Luminance	0.2511 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BE2 #E29942

analogous

#42DBE2 #428BE2 #4942E2

triadic

#428BE2 #E2428B #8BE242

tetradic

#428BE2 #E242DB #E29942 #42E249

square

#428BE2 #E242DB #E29942 #42E249

split-complementary

#428BE2 #E24942 #DBE242

monochromatic

#174F93 #1F6CC8 #428BE2 #77ACEA #ACCCF2

Accessibility & contrast

On white

3.49

#428BE2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.02

#428BE2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BE2

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BE2	#FFFFFF	#000000	##000000
##428BE2	1.00	3.49	6.02	6.02
#FFFFFF	3.49	1.00	21.00	21.00
#000000	6.02	21.00	1.00	1.00
##000000	6.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6391E6

Deuteranopia (green-blind)

#4A82E0

Tritanopia (blue-blind)

#009FAB

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428be2;
/* rgb */ color: rgb(66, 139, 226);
/* oklch */ color: oklch(63.2% 0.150 254.5);

Tailwind

colors: {
  custom: {
    50: '#89aceb',
    500: '#428be2',
    950: '#000000',
  },
}

SCSS

$custom: #428be2;
$custom-light: #89aceb;
$custom-dark: #000000;

JSON

{
  "hex": "#428be2",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 226
  },
  "hsl": {
    "h": 212.625,
    "s": 73.394,
    "l": 57.255
  },
  "oklch": {
    "l": 0.63202,
    "c": 0.15027,
    "h": 254.5
  },
  "luminance": 0.25114
}

Semantic roles & 50–950 ramp

primary

#428BE2

secondary

#E0C39F

accent

#9C38F0

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428BE2

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

Preview Lab → · Contrast checker → · Palette generator →