#428FAA#428FAA

#428FAA is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.3% C 0.086 H 223.9°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#428FAA
RGB	rgb(66, 143, 170)
HSL	hsl(196, 44%, 46%)
HSV	hsv(196, 61%, 67%)
CMYK	cmyk(61.2%, 15.9%, 0%, 33.3%)
CIE-LAB	lab(55.79, -15.44, -21.33)
CIE-LCH	lch(55.79, 26.33, 234.09°)
OKLab	oklab(61.26% -0.0616 -0.0594)
OKLCH	oklch(61.26% 0.086 223.9)
XYZ	xyz(19.3221, 23.7035, 41.5794)
Luminance	0.2371 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FAA #AA5D42

analogous

#42AA91 #428FAA #425BAA

triadic

#428FAA #AA428F #8FAA42

tetradic

#428FAA #9142AA #AA5D42 #5BAA42

square

#428FAA #9142AA #AA5D42 #5BAA42

split-complementary

#428FAA #AA425B #AA9142

monochromatic

#204552 #316A7E #428FAA #66ABC3 #92C3D5

Accessibility & contrast

On white

3.66

#428FAA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#428FAA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FAA

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FAA	#FFFFFF	#000000	##000000
##428FAA	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#808CAB

Deuteranopia (green-blind)

#7181AA

Tritanopia (blue-blind)

#009798

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428faa;
/* rgb */ color: rgb(66, 143, 170);
/* oklch */ color: oklch(61.3% 0.086 223.9);

Tailwind

colors: {
  custom: {
    50: '#81afc3',
    500: '#428faa',
    950: '#000000',
  },
}

SCSS

$custom: #428faa;
$custom-light: #81afc3;
$custom-dark: #000000;

JSON

{
  "hex": "#428faa",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 170
  },
  "hsl": {
    "h": 195.577,
    "s": 44.068,
    "l": 46.275
  },
  "oklch": {
    "l": 0.6126,
    "c": 0.0856,
    "h": 223.9
  },
  "luminance": 0.23705
}

Semantic roles & 50–950 ramp

primary

#428FAA

secondary

#C09688

accent

#7554D4

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428FAA

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

Preview Lab → · Contrast checker → · Palette generator →