#428FE1#428FE1

#428FE1 is a light, vivid cyan. Relative luminance 0.262; OKLCH L 64.0% C 0.145 H 252.3°. Best body text is #000000 at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#428FE1
RGB	rgb(66, 143, 225)
HSL	hsl(211, 73%, 57%)
HSV	hsv(211, 71%, 88%)
CMYK	cmyk(70.7%, 36.4%, 0%, 11.8%)
CIE-LAB	lab(58.26, 3.04, -48.54)
CIE-LCH	lch(58.26, 48.64, 273.59°)
OKLab	oklab(64.03% -0.0441 -0.1381)
OKLCH	oklch(64.03% 0.145 252.3)
XYZ	xyz(25.6548, 26.2366, 74.9317)
Luminance	0.2624 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FE1 #E19442

analogous

#42DFE1 #428FE1 #4442E1

triadic

#428FE1 #E1428F #8FE142

tetradic

#428FE1 #E142DF #E19442 #42E144

square

#428FE1 #E142DF #E19442 #42E144

split-complementary

#428FE1 #E14442 #DFE142

monochromatic

#175292 #1F70C6 #428FE1 #77AEE9 #ACCEF2

Accessibility & contrast

On white

3.36

#428FE1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.25

#428FE1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FE1

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FE1	#FFFFFF	#000000	##000000
##428FE1	1.00	3.36	6.25	6.25
#FFFFFF	3.36	1.00	21.00	21.00
#000000	6.25	21.00	1.00	1.00
##000000	6.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A94E4

Deuteranopia (green-blind)

#5285DF

Tritanopia (blue-blind)

#00A2AD

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #428fe1;
/* rgb */ color: rgb(66, 143, 225);
/* oklch */ color: oklch(64.0% 0.145 252.3);

Tailwind

colors: {
  custom: {
    50: '#89afeb',
    500: '#428fe1',
    950: '#000000',
  },
}

SCSS

$custom: #428fe1;
$custom-light: #89afeb;
$custom-dark: #000000;

JSON

{
  "hex": "#428fe1",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 225
  },
  "hsl": {
    "h": 210.943,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.64026,
    "c": 0.14496,
    "h": 252.3
  },
  "luminance": 0.26239
}

Semantic roles & 50–950 ramp

primary

#428FE1

secondary

#E0C09F

accent

#9738EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428FE1

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

Preview Lab → · Contrast checker → · Palette generator →