#428DEB#428DEB

#428DEB is a light, vivid cyan. Relative luminance 0.262; OKLCH L 64.2% C 0.160 H 255.5°. Best body text is #000000 at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#428DEB
RGB	rgb(66, 141, 235)
HSL	hsl(213, 81%, 59%)
HSV	hsv(213, 72%, 92%)
CMYK	cmyk(71.9%, 40%, 0%, 7.8%)
CIE-LAB	lab(58.23, 7.76, -54.15)
CIE-LCH	lch(58.23, 54.70, 278.15°)
OKLab	oklab(64.17% -0.0399 -0.1546)
OKLCH	oklch(64.17% 0.16 255.5)
XYZ	xyz(26.7615, 26.2032, 82.2285)
Luminance	0.2621 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DEB #EBA042

analogous

#42E1EB #428DEB #4C42EB

triadic

#428DEB #EB428D #8DEB42

tetradic

#428DEB #EB42E1 #EBA042 #42EB4C

square

#428DEB #EB42E1 #EBA042 #42EB4C

split-complementary

#428DEB #EB4C42 #E1EB42

monochromatic

#1151A2 #176DD9 #428DEB #79AEF1 #B1D0F7

Accessibility & contrast

On white

3.36

#428DEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.24

#428DEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DEB

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DEB	#FFFFFF	#000000	##000000
##428DEB	1.00	3.36	6.24	6.24
#FFFFFF	3.36	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)

#6194EF

Deuteranopia (green-blind)

#4585E9

Tritanopia (blue-blind)

#00A3B0

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #428deb;
/* rgb */ color: rgb(66, 141, 235);
/* oklch */ color: oklch(64.2% 0.160 255.5);

Tailwind

colors: {
  custom: {
    50: '#8aadf2',
    500: '#428deb',
    950: '#000000',
  },
}

SCSS

$custom: #428deb;
$custom-light: #8aadf2;
$custom-dark: #000000;

JSON

{
  "hex": "#428deb",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 235
  },
  "hsl": {
    "h": 213.373,
    "s": 80.861,
    "l": 59.02
  },
  "oklch": {
    "l": 0.64174,
    "c": 0.15965,
    "h": 255.5
  },
  "luminance": 0.26206
}

Semantic roles & 50–950 ramp

primary

#428DEB

secondary

#E6C8A3

accent

#9F31F7

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0D1017

muted

#7E7F85

Preview Lab

Preview with #428DEB

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

Preview Lab → · Contrast checker → · Palette generator →