#428FB8#428FB8

#428FB8 is a mid, moderate cyan. Relative luminance 0.243; OKLCH L 61.9% C 0.098 H 234.7°. Best body text is #000000 at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#428FB8
RGB	rgb(66, 143, 184)
HSL	hsl(201, 47%, 49%)
HSV	hsv(201, 64%, 72%)
CMYK	cmyk(64.1%, 22.3%, 0%, 27.8%)
CIE-LAB	lab(56.35, -10.94, -28.45)
CIE-LCH	lch(56.35, 30.48, 248.97°)
OKLab	oklab(61.89% -0.0564 -0.0797)
OKLCH	oklch(61.89% 0.098 234.7)
XYZ	xyz(20.7176, 24.2617, 48.9293)
Luminance	0.2426 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FB8 #B86B42

analogous

#42B8A6 #428FB8 #4254B8

triadic

#428FB8 #B8428F #8FB842

tetradic

#428FB8 #A642B8 #B86B42 #54B842

square

#428FB8 #A642B8 #B86B42 #54B842

split-complementary

#428FB8 #B84254 #B8A642

monochromatic

#22495E #326C8B #428FB8 #6DAACB #9AC4DB

Accessibility & contrast

On white

3.59

#428FB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.85

#428FB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FB8

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FB8	#FFFFFF	#000000	##000000
##428FB8	1.00	3.59	5.85	5.85
#FFFFFF	3.59	1.00	21.00	21.00
#000000	5.85	21.00	1.00	1.00
##000000	5.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8EBA

Deuteranopia (green-blind)

#6B82B7

Tritanopia (blue-blind)

#009A9D

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428fb8;
/* rgb */ color: rgb(66, 143, 184);
/* oklch */ color: oklch(61.9% 0.098 234.7);

Tailwind

colors: {
  custom: {
    50: '#82afcd',
    500: '#428fb8',
    950: '#000000',
  },
}

SCSS

$custom: #428fb8;
$custom-light: #82afcd;
$custom-dark: #000000;

JSON

{
  "hex": "#428fb8",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 184
  },
  "hsl": {
    "h": 200.847,
    "s": 47.2,
    "l": 49.02
  },
  "oklch": {
    "l": 0.61891,
    "c": 0.09769,
    "h": 234.7
  },
  "luminance": 0.24264
}

Semantic roles & 50–950 ramp

primary

#428FB8

secondary

#C7A28F

accent

#7F51D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428FB8

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

Preview Lab → · Contrast checker → · Palette generator →