#428FAE#428FAE

#428FAE is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.4% C 0.089 H 227.3°. Best body text is #000000 at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#428FAE
RGB	rgb(66, 143, 174)
HSL	hsl(197, 45%, 47%)
HSV	hsv(197, 62%, 68%)
CMYK	cmyk(62.1%, 17.8%, 0%, 31.8%)
CIE-LAB	lab(55.94, -14.17, -23.37)
CIE-LCH	lch(55.94, 27.34, 238.77°)
OKLab	oklab(61.43% -0.0601 -0.0652)
OKLCH	oklch(61.43% 0.089 227.3)
XYZ	xyz(19.7062, 23.8572, 43.6026)
Luminance	0.2386 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FAE #AE6142

analogous

#42AE97 #428FAE #4259AE

triadic

#428FAE #AE428F #8FAE42

tetradic

#428FAE #9742AE #AE6142 #59AE42

square

#428FAE #9742AE #AE6142 #59AE42

split-complementary

#428FAE #AE4259 #AE9742

monochromatic

#204655 #316B82 #428FAE #68ABC6 #94C3D6

Accessibility & contrast

On white

3.64

#428FAE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.77

#428FAE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FAE

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FAE	#FFFFFF	#000000	##000000
##428FAE	1.00	3.64	5.77	5.77
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.77	21.00	1.00	1.00
##000000	5.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F8CB0

Deuteranopia (green-blind)

#6F81AE

Tritanopia (blue-blind)

#009899

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428fae;
/* rgb */ color: rgb(66, 143, 174);
/* oklch */ color: oklch(61.4% 0.089 227.3);

Tailwind

colors: {
  custom: {
    50: '#81afc6',
    500: '#428fae',
    950: '#000000',
  },
}

SCSS

$custom: #428fae;
$custom-light: #81afc6;
$custom-dark: #000000;

JSON

{
  "hex": "#428fae",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 174
  },
  "hsl": {
    "h": 197.222,
    "s": 45,
    "l": 47.059
  },
  "oklch": {
    "l": 0.61435,
    "c": 0.08869,
    "h": 227.3
  },
  "luminance": 0.23859
}

Semantic roles & 50–950 ramp

primary

#428FAE

secondary

#C29A8A

accent

#7853D5

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428FAE

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

Preview Lab → · Contrast checker → · Palette generator →