#428FA3#428FA3

#428FA3 is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 61.0% C 0.081 H 217.3°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#428FA3
RGB	rgb(66, 143, 163)
HSL	hsl(192, 42%, 45%)
HSV	hsv(192, 60%, 64%)
CMYK	cmyk(59.5%, 12.3%, 0%, 36.1%)
CIE-LAB	lab(55.53, -17.62, -17.71)
CIE-LCH	lch(55.53, 24.99, 225.15°)
OKLab	oklab(60.96% -0.0644 -0.0492)
OKLCH	oklch(60.96% 0.081 217.3)
XYZ	xyz(18.6774, 23.4457, 38.1844)
Luminance	0.2345 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FA3 #A35642

analogous

#42A386 #428FA3 #425FA3

triadic

#428FA3 #A3428F #8FA342

tetradic

#428FA3 #8642A3 #A35642 #5FA342

square

#428FA3 #8642A3 #A35642 #5FA342

split-complementary

#428FA3 #A3425F #A38642

monochromatic

#1F434C #306977 #428FA3 #63ACC0 #8EC3D1

Accessibility & contrast

On white

3.69

#428FA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#428FA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FA3

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FA3	#FFFFFF	#000000	##000000
##428FA3	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#828BA4

Deuteranopia (green-blind)

#7380A3

Tritanopia (blue-blind)

#009695

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428fa3;
/* rgb */ color: rgb(66, 143, 163);
/* oklch */ color: oklch(61.0% 0.081 217.3);

Tailwind

colors: {
  custom: {
    50: '#80b0be',
    500: '#428fa3',
    950: '#000000',
  },
}

SCSS

$custom: #428fa3;
$custom-light: #80b0be;
$custom-dark: #000000;

JSON

{
  "hex": "#428fa3",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 163
  },
  "hsl": {
    "h": 192.371,
    "s": 42.358,
    "l": 44.902
  },
  "oklch": {
    "l": 0.60964,
    "c": 0.08106,
    "h": 217.3
  },
  "luminance": 0.23448
}

Semantic roles & 50–950 ramp

primary

#428FA3

secondary

#BC9084

accent

#6F56D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428FA3

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

Preview Lab → · Contrast checker → · Palette generator →