#428FA6#428FA6

#428FA6 is a mid, moderate cyan. Relative luminance 0.236; OKLCH L 61.1% C 0.083 H 220.3°. Best body text is #000000 at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#428FA6
RGB	rgb(66, 143, 166)
HSL	hsl(194, 43%, 45%)
HSV	hsv(194, 60%, 65%)
CMYK	cmyk(60.2%, 13.9%, 0%, 34.9%)
CIE-LAB	lab(55.64, -16.69, -19.27)
CIE-LCH	lch(55.64, 25.49, 229.09°)
OKLab	oklab(61.09% -0.0632 -0.0535)
OKLCH	oklch(61.09% 0.083 220.3)
XYZ	xyz(18.9494, 23.5545, 39.6168)
Luminance	0.2356 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FA6 #A65942

analogous

#42A68B #428FA6 #425DA6

triadic

#428FA6 #A6428F #8FA642

tetradic

#428FA6 #8B42A6 #A65942 #5DA642

square

#428FA6 #8B42A6 #A65942 #5DA642

split-complementary

#428FA6 #A6425D #A68B42

monochromatic

#1F444E #31697A #428FA6 #64ACC1 #90C3D3

Accessibility & contrast

On white

3.68

#428FA6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.71

#428FA6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FA6

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FA6	#FFFFFF	#000000	##000000
##428FA6	1.00	3.68	5.71	5.71
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.71	21.00	1.00	1.00
##000000	5.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#818BA7

Deuteranopia (green-blind)

#7281A6

Tritanopia (blue-blind)

#009796

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428fa6;
/* rgb */ color: rgb(66, 143, 166);
/* oklch */ color: oklch(61.1% 0.083 220.3);

Tailwind

colors: {
  custom: {
    50: '#80b0c0',
    500: '#428fa6',
    950: '#000000',
  },
}

SCSS

$custom: #428fa6;
$custom-light: #80b0c0;
$custom-dark: #000000;

JSON

{
  "hex": "#428fa6",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 166
  },
  "hsl": {
    "h": 193.8,
    "s": 43.103,
    "l": 45.49
  },
  "oklch": {
    "l": 0.6109,
    "c": 0.08286,
    "h": 220.3
  },
  "luminance": 0.23556
}

Semantic roles & 50–950 ramp

primary

#428FA6

secondary

#BE9386

accent

#7255D3

background

#F8FAFB

surface

#EFF4F7

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428FA6

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

Preview Lab → · Contrast checker → · Palette generator →