#428EE1#428EE1

#428EE1 is a light, vivid cyan. Relative luminance 0.259; OKLCH L 63.8% C 0.146 H 252.8°. Best body text is #000000 at 6.19:1 contrast (WCAG AA passes).

Color values

HEX	#428EE1
RGB	rgb(66, 142, 225)
HSL	hsl(211, 73%, 57%)
HSV	hsv(211, 71%, 88%)
CMYK	cmyk(70.7%, 36.9%, 0%, 11.8%)
CIE-LAB	lab(57.98, 3.63, -48.99)
CIE-LCH	lch(57.98, 49.12, 274.24°)
OKLab	oklab(63.81% -0.0432 -0.1394)
OKLCH	oklch(63.81% 0.146 252.8)
XYZ	xyz(25.5053, 25.9377, 74.8819)
Luminance	0.2594 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EE1 #E19542

analogous

#42DDE1 #428EE1 #4642E1

triadic

#428EE1 #E1428E #8EE142

tetradic

#428EE1 #E142DD #E19542 #42E146

square

#428EE1 #E142DD #E19542 #42E146

split-complementary

#428EE1 #E14642 #DDE142

monochromatic

#175292 #1F6FC6 #428EE1 #77AEE9 #ACCDF2

Accessibility & contrast

On white

3.39

#428EE1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.19

#428EE1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EE1

6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EE1	#FFFFFF	#000000	##000000
##428EE1	1.00	3.39	6.19	6.19
#FFFFFF	3.39	1.00	21.00	21.00
#000000	6.19	21.00	1.00	1.00
##000000	6.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6893E4

Deuteranopia (green-blind)

#5085DF

Tritanopia (blue-blind)

#00A1AD

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #428ee1;
/* rgb */ color: rgb(66, 142, 225);
/* oklch */ color: oklch(63.8% 0.146 252.8);

Tailwind

colors: {
  custom: {
    50: '#89aeeb',
    500: '#428ee1',
    950: '#000000',
  },
}

SCSS

$custom: #428ee1;
$custom-light: #89aeeb;
$custom-dark: #000000;

JSON

{
  "hex": "#428ee1",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 225
  },
  "hsl": {
    "h": 211.321,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.63805,
    "c": 0.14595,
    "h": 252.8
  },
  "luminance": 0.2594
}

Semantic roles & 50–950 ramp

primary

#428EE1

secondary

#E0C19F

accent

#9838EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428EE1

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

Preview Lab → · Contrast checker → · Palette generator →