#428CE1#428CE1

#428CE1 is a light, vivid cyan. Relative luminance 0.254; OKLCH L 63.4% C 0.148 H 253.8°. Best body text is #000000 at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#428CE1
RGB	rgb(66, 140, 225)
HSL	hsl(212, 73%, 57%)
HSV	hsv(212, 71%, 88%)
CMYK	cmyk(70.7%, 37.8%, 0%, 11.8%)
CIE-LAB	lab(57.41, 4.82, -49.89)
CIE-LCH	lch(57.41, 50.12, 275.52°)
OKLab	oklab(63.36% -0.0413 -0.1421)
OKLCH	oklch(63.36% 0.148 253.8)
XYZ	xyz(25.2104, 25.3479, 74.7836)
Luminance	0.2535 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CE1 #E19742

analogous

#42DCE1 #428CE1 #4742E1

triadic

#428CE1 #E1428C #8CE142

tetradic

#428CE1 #E142DC #E19742 #42E147

square

#428CE1 #E142DC #E19742 #42E147

split-complementary

#428CE1 #E14742 #DCE142

monochromatic

#175092 #1F6DC6 #428CE1 #77ACE9 #ACCCF2

Accessibility & contrast

On white

3.46

#428CE1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.07

#428CE1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE1

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CE1	#FFFFFF	#000000	##000000
##428CE1	1.00	3.46	6.07	6.07
#FFFFFF	3.46	1.00	21.00	21.00
#000000	6.07	21.00	1.00	1.00
##000000	6.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6592E4

Deuteranopia (green-blind)

#4D83DF

Tritanopia (blue-blind)

#00A0AC

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428ce1;
/* rgb */ color: rgb(66, 140, 225);
/* oklch */ color: oklch(63.4% 0.148 253.8);

Tailwind

colors: {
  custom: {
    50: '#89adeb',
    500: '#428ce1',
    950: '#000000',
  },
}

SCSS

$custom: #428ce1;
$custom-light: #89adeb;
$custom-dark: #000000;

JSON

{
  "hex": "#428ce1",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 225
  },
  "hsl": {
    "h": 212.075,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.63363,
    "c": 0.14796,
    "h": 253.8
  },
  "luminance": 0.25351
}

Semantic roles & 50–950 ramp

primary

#428CE1

secondary

#E0C29F

accent

#9A38EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428CE1

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

Preview Lab → · Contrast checker → · Palette generator →