#428FAF#428FAF

#428FAF is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.5% C 0.090 H 228.1°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#428FAF
RGB	rgb(66, 143, 175)
HSL	hsl(198, 45%, 47%)
HSV	hsv(198, 62%, 69%)
CMYK	cmyk(62.3%, 18.3%, 0%, 31.4%)
CIE-LAB	lab(55.98, -13.85, -23.89)
CIE-LCH	lch(55.98, 27.61, 239.89°)
OKLab	oklab(61.48% -0.0597 -0.0667)
OKLCH	oklch(61.48% 0.09 228.1)
XYZ	xyz(19.8041, 23.8963, 44.1179)
Luminance	0.2390 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FAF #AF6242

analogous

#42AF99 #428FAF #4258AF

triadic

#428FAF #AF428F #8FAF42

tetradic

#428FAF #9942AF #AF6242 #58AF42

square

#428FAF #9942AF #AF6242 #58AF42

split-complementary

#428FAF #AF4258 #AF9942

monochromatic

#204656 #316B83 #428FAF #68ABC6 #95C3D7

Accessibility & contrast

On white

3.63

#428FAF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#428FAF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FAF

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FAF	#FFFFFF	#000000	##000000
##428FAF	1.00	3.63	5.78	5.78
#FFFFFF	3.63	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8DB1

Deuteranopia (green-blind)

#6F81AF

Tritanopia (blue-blind)

#009899

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428faf;
/* rgb */ color: rgb(66, 143, 175);
/* oklch */ color: oklch(61.5% 0.090 228.1);

Tailwind

colors: {
  custom: {
    50: '#81afc7',
    500: '#428faf',
    950: '#000000',
  },
}

SCSS

$custom: #428faf;
$custom-light: #81afc7;
$custom-dark: #000000;

JSON

{
  "hex": "#428faf",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 175
  },
  "hsl": {
    "h": 197.615,
    "s": 45.228,
    "l": 47.255
  },
  "oklch": {
    "l": 0.61479,
    "c": 0.08951,
    "h": 228.1
  },
  "luminance": 0.23898
}

Semantic roles & 50–950 ramp

primary

#428FAF

secondary

#C29B8A

accent

#7953D5

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428FAF

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

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