#428CAA#428CAA

#428CAA is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.5% C 0.086 H 227.4°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#428CAA
RGB	rgb(66, 140, 170)
HSL	hsl(197, 44%, 46%)
HSV	hsv(197, 61%, 67%)
CMYK	cmyk(61.2%, 17.6%, 0%, 33.3%)
CIE-LAB	lab(54.88, -13.80, -22.72)
CIE-LCH	lch(54.88, 26.58, 238.73°)
OKLab	oklab(60.54% -0.0583 -0.0634)
OKLCH	oklch(60.54% 0.086 227.4)
XYZ	xyz(18.8777, 22.8148, 41.4313)
Luminance	0.2282 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CAA #AA6042

analogous

#42AA94 #428CAA #4258AA

triadic

#428CAA #AA428C #8CAA42

tetradic

#428CAA #9442AA #AA6042 #58AA42

square

#428CAA #9442AA #AA6042 #58AA42

split-complementary

#428CAA #AA4258 #AA9442

monochromatic

#204352 #31687E #428CAA #66A8C3 #92C1D5

Accessibility & contrast

On white

3.77

#428CAA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#428CAA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CAA

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CAA	#FFFFFF	#000000	##000000
##428CAA	1.00	3.77	5.56	5.56
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8AAC

Deuteranopia (green-blind)

#6D7FAA

Tritanopia (blue-blind)

#009596

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428caa;
/* rgb */ color: rgb(66, 140, 170);
/* oklch */ color: oklch(60.5% 0.086 227.4);

Tailwind

colors: {
  custom: {
    50: '#80adc3',
    500: '#428caa',
    950: '#000000',
  },
}

SCSS

$custom: #428caa;
$custom-light: #80adc3;
$custom-dark: #000000;

JSON

{
  "hex": "#428caa",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 170
  },
  "hsl": {
    "h": 197.308,
    "s": 44.068,
    "l": 46.275
  },
  "oklch": {
    "l": 0.60535,
    "c": 0.08611,
    "h": 227.4
  },
  "luminance": 0.22817
}

Semantic roles & 50–950 ramp

primary

#428CAA

secondary

#C09888

accent

#7954D4

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428CAA

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

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