#428BE0#428BE0

#428BE0 is a light, vivid cyan. Relative luminance 0.250; OKLCH L 63.1% C 0.148 H 254.0°. Best body text is #000000 at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#428BE0
RGB	rgb(66, 139, 224)
HSL	hsl(212, 72%, 57%)
HSV	hsv(212, 71%, 88%)
CMYK	cmyk(70.5%, 37.9%, 0%, 12.2%)
CIE-LAB	lab(57.08, 5.06, -49.86)
CIE-LCH	lch(57.08, 50.12, 275.80°)
OKLab	oklab(63.09% -0.0406 -0.142)
OKLCH	oklch(63.09% 0.148 254)
XYZ	xyz(24.9290, 25.0026, 74.0187)
Luminance	0.2500 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BE0 #E09742

analogous

#42DAE0 #428BE0 #4842E0

triadic

#428BE0 #E0428B #8BE042

tetradic

#428BE0 #E042DA #E09742 #42E048

square

#428BE0 #E042DA #E09742 #42E048

split-complementary

#428BE0 #E04842 #DAE042

monochromatic

#184F90 #206CC5 #428BE0 #77ABE9 #ABCCF1

Accessibility & contrast

On white

3.50

#428BE0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.00

#428BE0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BE0

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BE0	#FFFFFF	#000000	##000000
##428BE0	1.00	3.50	6.00	6.00
#FFFFFF	3.50	1.00	21.00	21.00
#000000	6.00	21.00	1.00	1.00
##000000	6.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6491E3

Deuteranopia (green-blind)

#4C82DE

Tritanopia (blue-blind)

#009FAB

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428be0;
/* rgb */ color: rgb(66, 139, 224);
/* oklch */ color: oklch(63.1% 0.148 254.0);

Tailwind

colors: {
  custom: {
    50: '#88acea',
    500: '#428be0',
    950: '#000000',
  },
}

SCSS

$custom: #428be0;
$custom-light: #88acea;
$custom-dark: #000000;

JSON

{
  "hex": "#428be0",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 224
  },
  "hsl": {
    "h": 212.278,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.63085,
    "c": 0.14771,
    "h": 254
  },
  "luminance": 0.25005
}

Semantic roles & 50–950 ramp

primary

#428BE0

secondary

#DFC19F

accent

#9B39EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428BE0

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

Preview Lab → · Contrast checker → · Palette generator →