#428BA4#428BA4

#428BA4 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.0% C 0.082 H 223.2°. Best body text is #000000 at 5.46:1 contrast (WCAG AA passes).

Color values

HEX	#428BA4
RGB	rgb(66, 139, 164)
HSL	hsl(195, 43%, 45%)
HSV	hsv(195, 60%, 64%)
CMYK	cmyk(59.8%, 15.2%, 0%, 35.7%)
CIE-LAB	lab(54.35, -15.14, -20.09)
CIE-LCH	lch(54.35, 25.16, 233.00°)
OKLab	oklab(60.03% -0.0595 -0.0559)
OKLCH	oklch(60.03% 0.082 223.2)
XYZ	xyz(18.1776, 22.3021, 38.4615)
Luminance	0.2230 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BA4 #A45B42

analogous

#42A48C #428BA4 #425AA4

triadic

#428BA4 #A4428B #8BA442

tetradic

#428BA4 #8C42A4 #A45B42 #5AA442

square

#428BA4 #8C42A4 #A45B42 #5AA442

split-complementary

#428BA4 #A4425A #A48C42

monochromatic

#1F414D #306678 #428BA4 #63A8C0 #8FC1D2

Accessibility & contrast

On white

3.85

#428BA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.46

#428BA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BA4

5.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BA4	#FFFFFF	#000000	##000000
##428BA4	1.00	3.85	5.46	5.46
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.46	21.00	1.00	1.00
##000000	5.46	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D88A5

Deuteranopia (green-blind)

#6F7DA4

Tritanopia (blue-blind)

#009393

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #428ba4;
/* rgb */ color: rgb(66, 139, 164);
/* oklch */ color: oklch(60.0% 0.082 223.2);

Tailwind

colors: {
  custom: {
    50: '#80adbf',
    500: '#428ba4',
    950: '#000000',
  },
}

SCSS

$custom: #428ba4;
$custom-light: #80adbf;
$custom-dark: #000000;

JSON

{
  "hex": "#428ba4",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 164
  },
  "hsl": {
    "h": 195.306,
    "s": 42.609,
    "l": 45.098
  },
  "oklch": {
    "l": 0.60031,
    "c": 0.08165,
    "h": 223.2
  },
  "luminance": 0.22304
}

Semantic roles & 50–950 ramp

primary

#428BA4

secondary

#BD9385

accent

#7555D2

background

#F8FAFB

surface

#EFF4F7

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428BA4

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

Preview Lab → · Contrast checker → · Palette generator →