#428CE0#428CE0

#428CE0 is a light, vivid cyan. Relative luminance 0.253; OKLCH L 63.3% C 0.147 H 253.5°. Best body text is #000000 at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#428CE0
RGB	rgb(66, 140, 224)
HSL	hsl(212, 72%, 57%)
HSV	hsv(212, 71%, 88%)
CMYK	cmyk(70.5%, 37.5%, 0%, 12.2%)
CIE-LAB	lab(57.36, 4.47, -49.41)
CIE-LCH	lch(57.36, 49.61, 275.17°)
OKLab	oklab(63.31% -0.0415 -0.1407)
OKLCH	oklch(63.31% 0.147 253.5)
XYZ	xyz(25.0744, 25.2935, 74.0672)
Luminance	0.2530 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CE0 #E09642

analogous

#42DBE0 #428CE0 #4742E0

triadic

#428CE0 #E0428C #8CE042

tetradic

#428CE0 #E042DB #E09642 #42E047

square

#428CE0 #E042DB #E09642 #42E047

split-complementary

#428CE0 #E04742 #DBE042

monochromatic

#185090 #206DC5 #428CE0 #77ACE9 #ABCCF1

Accessibility & contrast

On white

3.47

#428CE0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.06

#428CE0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE0

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CE0	#FFFFFF	#000000	##000000
##428CE0	1.00	3.47	6.06	6.06
#FFFFFF	3.47	1.00	21.00	21.00
#000000	6.06	21.00	1.00	1.00
##000000	6.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6692E3

Deuteranopia (green-blind)

#4E83DE

Tritanopia (blue-blind)

#00A0AB

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428ce0;
/* rgb */ color: rgb(66, 140, 224);
/* oklch */ color: oklch(63.3% 0.147 253.5);

Tailwind

colors: {
  custom: {
    50: '#88adea',
    500: '#428ce0',
    950: '#000000',
  },
}

SCSS

$custom: #428ce0;
$custom-light: #88adea;
$custom-dark: #000000;

JSON

{
  "hex": "#428ce0",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 224
  },
  "hsl": {
    "h": 211.899,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.63305,
    "c": 0.1467,
    "h": 253.5
  },
  "luminance": 0.25296
}

Semantic roles & 50–950 ramp

primary

#428CE0

secondary

#DFC19F

accent

#9A39EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428CE0

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

Preview Lab → · Contrast checker → · Palette generator →