#428ECB#428ECB

#428ECB is a light, moderate cyan. Relative luminance 0.248; OKLCH L 62.6% C 0.119 H 245.6°. Best body text is #000000 at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#428ECB
RGB	rgb(66, 142, 203)
HSL	hsl(207, 57%, 53%)
HSV	hsv(207, 67%, 80%)
CMYK	cmyk(67.5%, 30%, 0%, 20.4%)
CIE-LAB	lab(56.89, -4.00, -38.36)
CIE-LCH	lch(56.89, 38.57, 264.05°)
OKLab	oklab(62.6% -0.0492 -0.1084)
OKLCH	oklch(62.6% 0.119 245.6)
XYZ	xyz(22.6952, 24.8137, 60.0818)
Luminance	0.2482 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ECB #CB7F42

analogous

#42CBC3 #428ECB #424ACB

triadic

#428ECB #CB428E #8ECB42

tetradic

#428ECB #C342CB #CB7F42 #4ACB42

square

#428ECB #C342CB #CB7F42 #4ACB42

split-complementary

#428ECB #CB424A #CBC342

monochromatic

#204E73 #2D6EA3 #428ECB #72ABD8 #A2C7E5

Accessibility & contrast

On white

3.52

#428ECB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.96

#428ECB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ECB

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ECB	#FFFFFF	#000000	##000000
##428ECB	1.00	3.52	5.96	5.96
#FFFFFF	3.52	1.00	21.00	21.00
#000000	5.96	21.00	1.00	1.00
##000000	5.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7390CE

Deuteranopia (green-blind)

#6083CA

Tritanopia (blue-blind)

#009DA4

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428ecb;
/* rgb */ color: rgb(66, 142, 203);
/* oklch */ color: oklch(62.6% 0.119 245.6);

Tailwind

colors: {
  custom: {
    50: '#85aedb',
    500: '#428ecb',
    950: '#000000',
  },
}

SCSS

$custom: #428ecb;
$custom-light: #85aedb;
$custom-dark: #000000;

JSON

{
  "hex": "#428ecb",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 203
  },
  "hsl": {
    "h": 206.715,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.62598,
    "c": 0.11904,
    "h": 245.6
  },
  "luminance": 0.24816
}

Semantic roles & 50–950 ramp

primary

#428ECB

secondary

#D2B197

accent

#8C48E0

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428ECB

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

Preview Lab → · Contrast checker → · Palette generator →