#428ADB#428ADB

#428ADB is a light, vivid cyan. Relative luminance 0.244; OKLCH L 62.6% C 0.142 H 253.3°. Best body text is #000000 at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#428ADB
RGB	rgb(66, 138, 219)
HSL	hsl(212, 68%, 56%)
HSV	hsv(212, 70%, 86%)
CMYK	cmyk(69.9%, 37%, 0%, 14.1%)
CIE-LAB	lab(56.53, 3.90, -47.93)
CIE-LCH	lch(56.53, 48.09, 274.65°)
OKLab	oklab(62.57% -0.0409 -0.1364)
OKLCH	oklch(62.57% 0.142 253.3)
XYZ	xyz(24.1167, 24.4471, 70.4519)
Luminance	0.2445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ADB #DB9342

analogous

#42D6DB #428ADB #4642DB

triadic

#428ADB #DB428A #8ADB42

tetradic

#428ADB #DB42D6 #DB9342 #42DB46

square

#428ADB #DB42D6 #DB9342 #42DB46

split-complementary

#428ADB #DB4642 #D6DB42

monochromatic

#1A4E89 #246BBC #428ADB #75AAE5 #A9CAEF

Accessibility & contrast

On white

3.57

#428ADB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.89

#428ADB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ADB

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ADB	#FFFFFF	#000000	##000000
##428ADB	1.00	3.57	5.89	5.89
#FFFFFF	3.57	1.00	21.00	21.00
#000000	5.89	21.00	1.00	1.00
##000000	5.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#658FDE

Deuteranopia (green-blind)

#4F81D9

Tritanopia (blue-blind)

#009DA8

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428adb;
/* rgb */ color: rgb(66, 138, 219);
/* oklch */ color: oklch(62.6% 0.142 253.3);

Tailwind

colors: {
  custom: {
    50: '#87abe6',
    500: '#428adb',
    950: '#000000',
  },
}

SCSS

$custom: #428adb;
$custom-light: #87abe6;
$custom-dark: #000000;

JSON

{
  "hex": "#428adb",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 219
  },
  "hsl": {
    "h": 211.765,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.62574,
    "c": 0.14237,
    "h": 253.3
  },
  "luminance": 0.2445
}

Semantic roles & 50–950 ramp

primary

#428ADB

secondary

#DCBE9D

accent

#993DEB

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428ADB

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

Preview Lab → · Contrast checker → · Palette generator →