#428EDB#428EDB

#428EDB is a light, vivid cyan. Relative luminance 0.256; OKLCH L 63.5% C 0.138 H 251.2°. Best body text is #000000 at 6.12:1 contrast (WCAG AA passes).

Color values

HEX	#428EDB
RGB	rgb(66, 142, 219)
HSL	hsl(210, 68%, 56%)
HSV	hsv(210, 70%, 86%)
CMYK	cmyk(69.9%, 35.2%, 0%, 14.1%)
CIE-LAB	lab(57.67, 1.53, -46.13)
CIE-LCH	lch(57.67, 46.15, 271.90°)
OKLab	oklab(63.46% -0.0447 -0.131)
OKLCH	oklch(63.46% 0.138 251.2)
XYZ	xyz(24.7012, 25.6161, 70.6467)
Luminance	0.2562 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EDB #DB8F42

analogous

#42DADB #428EDB #4242DB

triadic

#428EDB #DB428E #8EDB42

tetradic

#428EDB #DB42DA #DB8F42 #42DB42

square

#428EDB #DB42DA #DB8F42 #42DB42

split-complementary

#428EDB #DB4242 #DADB42

monochromatic

#1A5189 #246FBC #428EDB #75ADE5 #A9CBEF

Accessibility & contrast

On white

3.43

#428EDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.12

#428EDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EDB

6.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EDB	#FFFFFF	#000000	##000000
##428EDB	1.00	3.43	6.12	6.12
#FFFFFF	3.43	1.00	21.00	21.00
#000000	6.12	21.00	1.00	1.00
##000000	6.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B92DE

Deuteranopia (green-blind)

#5584D9

Tritanopia (blue-blind)

#00A0AA

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #428edb;
/* rgb */ color: rgb(66, 142, 219);
/* oklch */ color: oklch(63.5% 0.138 251.2);

Tailwind

colors: {
  custom: {
    50: '#87aee6',
    500: '#428edb',
    950: '#000000',
  },
}

SCSS

$custom: #428edb;
$custom-light: #87aee6;
$custom-dark: #000000;

JSON

{
  "hex": "#428edb",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 219
  },
  "hsl": {
    "h": 210.196,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.63464,
    "c": 0.13844,
    "h": 251.2
  },
  "luminance": 0.25619
}

Semantic roles & 50–950 ramp

primary

#428EDB

secondary

#DCBD9D

accent

#943DEB

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428EDB

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

Preview Lab → · Contrast checker → · Palette generator →