#428FA1#428FA1

#428FA1 is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 60.9% C 0.080 H 215.3°. Best body text is #000000 at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#428FA1
RGB	rgb(66, 143, 161)
HSL	hsl(191, 42%, 45%)
HSV	hsv(191, 59%, 63%)
CMYK	cmyk(59%, 11.2%, 0%, 36.9%)
CIE-LAB	lab(55.46, -18.24, -16.68)
CIE-LCH	lch(55.46, 24.71, 222.44°)
OKLab	oklab(60.88% -0.0653 -0.0462)
OKLCH	oklch(60.88% 0.08 215.3)
XYZ	xyz(18.4997, 23.3746, 37.2481)
Luminance	0.2338 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FA1 #A15442

analogous

#42A183 #428FA1 #4260A1

triadic

#428FA1 #A1428F #8FA142

tetradic

#428FA1 #8342A1 #A15442 #60A142

square

#428FA1 #8342A1 #A15442 #60A142

split-complementary

#428FA1 #A14260 #A18342

monochromatic

#1E424A #306876 #428FA1 #62ADBF #8DC4D0

Accessibility & contrast

On white

3.70

#428FA1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.68

#428FA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FA1

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FA1	#FFFFFF	#000000	##000000
##428FA1	1.00	3.70	5.68	5.68
#FFFFFF	3.70	1.00	21.00	21.00
#000000	5.68	21.00	1.00	1.00
##000000	5.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#828BA2

Deuteranopia (green-blind)

#7480A1

Tritanopia (blue-blind)

#009695

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428fa1;
/* rgb */ color: rgb(66, 143, 161);
/* oklch */ color: oklch(60.9% 0.080 215.3);

Tailwind

colors: {
  custom: {
    50: '#80b0bc',
    500: '#428fa1',
    950: '#000000',
  },
}

SCSS

$custom: #428fa1;
$custom-light: #80b0bc;
$custom-dark: #000000;

JSON

{
  "hex": "#428fa1",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 161
  },
  "hsl": {
    "h": 191.368,
    "s": 41.85,
    "l": 44.51
  },
  "oklch": {
    "l": 0.60882,
    "c": 0.07999,
    "h": 215.3
  },
  "luminance": 0.23376
}

Semantic roles & 50–950 ramp

primary

#428FA1

secondary

#BB8E83

accent

#6E56D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428FA1

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

Preview Lab → · Contrast checker → · Palette generator →