#428FAC#428FAC

#428FAC is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.3% C 0.087 H 225.7°. Best body text is #000000 at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#428FAC
RGB	rgb(66, 143, 172)
HSL	hsl(196, 45%, 47%)
HSV	hsv(196, 62%, 67%)
CMYK	cmyk(61.6%, 16.9%, 0%, 32.5%)
CIE-LAB	lab(55.87, -14.81, -22.35)
CIE-LCH	lch(55.87, 26.81, 236.47°)
OKLab	oklab(61.35% -0.0609 -0.0623)
OKLCH	oklch(61.35% 0.087 225.7)
XYZ	xyz(19.5127, 23.7798, 42.5834)
Luminance	0.2378 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FAC #AC5F42

analogous

#42AC94 #428FAC #425AAC

triadic

#428FAC #AC428F #8FAC42

tetradic

#428FAC #9442AC #AC5F42 #5AAC42

square

#428FAC #9442AC #AC5F42 #5AAC42

split-complementary

#428FAC #AC425A #AC9442

monochromatic

#204554 #316A80 #428FAC #67ABC5 #93C3D6

Accessibility & contrast

On white

3.65

#428FAC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.76

#428FAC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FAC

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FAC	#FFFFFF	#000000	##000000
##428FAC	1.00	3.65	5.76	5.76
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.76	21.00	1.00	1.00
##000000	5.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F8CAD

Deuteranopia (green-blind)

#7081AC

Tritanopia (blue-blind)

#009898

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428fac;
/* rgb */ color: rgb(66, 143, 172);
/* oklch */ color: oklch(61.3% 0.087 225.7);

Tailwind

colors: {
  custom: {
    50: '#81afc4',
    500: '#428fac',
    950: '#000000',
  },
}

SCSS

$custom: #428fac;
$custom-light: #81afc4;
$custom-dark: #000000;

JSON

{
  "hex": "#428fac",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 172
  },
  "hsl": {
    "h": 196.415,
    "s": 44.538,
    "l": 46.667
  },
  "oklch": {
    "l": 0.61347,
    "c": 0.08711,
    "h": 225.7
  },
  "luminance": 0.23782
}

Semantic roles & 50–950 ramp

primary

#428FAC

secondary

#C19889

accent

#7754D4

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428FAC

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

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