#428DA3#428DA3

#428DA3 is a mid, moderate cyan. Relative luminance 0.229; OKLCH L 60.5% C 0.081 H 219.8°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#428DA3
RGB	rgb(66, 141, 163)
HSL	hsl(194, 42%, 45%)
HSV	hsv(194, 60%, 64%)
CMYK	cmyk(59.5%, 13.5%, 0%, 36.1%)
CIE-LAB	lab(54.92, -16.54, -18.64)
CIE-LCH	lch(54.92, 24.93, 228.42°)
OKLab	oklab(60.48% -0.0622 -0.0518)
OKLCH	oklch(60.48% 0.081 219.8)
XYZ	xyz(18.3799, 22.8506, 38.0852)
Luminance	0.2285 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DA3 #A35842

analogous

#42A388 #428DA3 #425DA3

triadic

#428DA3 #A3428D #8DA342

tetradic

#428DA3 #8842A3 #A35842 #5DA342

square

#428DA3 #8842A3 #A35842 #5DA342

split-complementary

#428DA3 #A3425D #A38842

monochromatic

#1F424C #306777 #428DA3 #63ABC0 #8EC2D1

Accessibility & contrast

On white

3.77

#428DA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#428DA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DA3

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DA3	#FFFFFF	#000000	##000000
##428DA3	1.00	3.77	5.57	5.57
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.57	21.00	1.00	1.00
##000000	5.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F89A4

Deuteranopia (green-blind)

#717FA3

Tritanopia (blue-blind)

#009494

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428da3;
/* rgb */ color: rgb(66, 141, 163);
/* oklch */ color: oklch(60.5% 0.081 219.8);

Tailwind

colors: {
  custom: {
    50: '#80aebe',
    500: '#428da3',
    950: '#000000',
  },
}

SCSS

$custom: #428da3;
$custom-light: #80aebe;
$custom-dark: #000000;

JSON

{
  "hex": "#428da3",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 163
  },
  "hsl": {
    "h": 193.608,
    "s": 42.358,
    "l": 44.902
  },
  "oklch": {
    "l": 0.60476,
    "c": 0.08093,
    "h": 219.8
  },
  "luminance": 0.22852
}

Semantic roles & 50–950 ramp

primary

#428DA3

secondary

#BC9184

accent

#7256D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428DA3

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

Preview Lab → · Contrast checker → · Palette generator →