#428FE0#428FE0

#428FE0 is a light, vivid cyan. Relative luminance 0.262; OKLCH L 64.0% C 0.144 H 252.0°. Best body text is #000000 at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#428FE0
RGB	rgb(66, 143, 224)
HSL	hsl(211, 72%, 57%)
HSV	hsv(211, 71%, 88%)
CMYK	cmyk(70.5%, 36.2%, 0%, 12.2%)
CIE-LAB	lab(58.21, 2.69, -48.06)
CIE-LCH	lch(58.21, 48.14, 273.20°)
OKLab	oklab(63.97% -0.0443 -0.1367)
OKLCH	oklch(63.97% 0.144 252)
XYZ	xyz(25.5188, 26.1822, 74.2153)
Luminance	0.2619 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FE0 #E09342

analogous

#42DEE0 #428FE0 #4442E0

triadic

#428FE0 #E0428F #8FE042

tetradic

#428FE0 #E042DE #E09342 #42E044

square

#428FE0 #E042DE #E09342 #42E044

split-complementary

#428FE0 #E04442 #DEE042

monochromatic

#185290 #2070C5 #428FE0 #77AEE9 #ABCDF1

Accessibility & contrast

On white

3.37

#428FE0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.24

#428FE0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FE0

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FE0	#FFFFFF	#000000	##000000
##428FE0	1.00	3.37	6.24	6.24
#FFFFFF	3.37	1.00	21.00	21.00
#000000	6.24	21.00	1.00	1.00
##000000	6.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A94E3

Deuteranopia (green-blind)

#5385DE

Tritanopia (blue-blind)

#00A2AD

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #428fe0;
/* rgb */ color: rgb(66, 143, 224);
/* oklch */ color: oklch(64.0% 0.144 252.0);

Tailwind

colors: {
  custom: {
    50: '#88afea',
    500: '#428fe0',
    950: '#000000',
  },
}

SCSS

$custom: #428fe0;
$custom-light: #88afea;
$custom-dark: #000000;

JSON

{
  "hex": "#428fe0",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 224
  },
  "hsl": {
    "h": 210.759,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.63969,
    "c": 0.14371,
    "h": 252
  },
  "luminance": 0.26185
}

Semantic roles & 50–950 ramp

primary

#428FE0

secondary

#DFC09F

accent

#9639EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428FE0

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

Preview Lab → · Contrast checker → · Palette generator →