#428CAB#428CAB

#428CAB is a mid, moderate cyan. Relative luminance 0.229; OKLCH L 60.6% C 0.087 H 228.2°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#428CAB
RGB	rgb(66, 140, 171)
HSL	hsl(198, 44%, 46%)
HSV	hsv(198, 61%, 67%)
CMYK	cmyk(61.4%, 18.1%, 0%, 32.9%)
CIE-LAB	lab(54.92, -13.48, -23.23)
CIE-LCH	lch(54.92, 26.86, 239.88°)
OKLab	oklab(60.58% -0.0579 -0.0648)
OKLCH	oklch(60.58% 0.087 228.2)
XYZ	xyz(18.9727, 22.8528, 41.9314)
Luminance	0.2286 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CAB #AB6142

analogous

#42AB96 #428CAB #4258AB

triadic

#428CAB #AB428C #8CAB42

tetradic

#428CAB #9642AB #AB6142 #58AB42

square

#428CAB #9642AB #AB6142 #58AB42

split-complementary

#428CAB #AB4258 #AB9642

monochromatic

#204453 #31687F #428CAB #66A8C4 #92C1D5

Accessibility & contrast

On white

3.77

#428CAB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#428CAB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CAB

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CAB	#FFFFFF	#000000	##000000
##428CAB	1.00	3.77	5.57	5.57
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.57	21.00	1.00	1.00
##000000	5.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8AAD

Deuteranopia (green-blind)

#6D7FAB

Tritanopia (blue-blind)

#009596

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428cab;
/* rgb */ color: rgb(66, 140, 171);
/* oklch */ color: oklch(60.6% 0.087 228.2);

Tailwind

colors: {
  custom: {
    50: '#80adc4',
    500: '#428cab',
    950: '#000000',
  },
}

SCSS

$custom: #428cab;
$custom-light: #80adc4;
$custom-dark: #000000;

JSON

{
  "hex": "#428cab",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 171
  },
  "hsl": {
    "h": 197.714,
    "s": 44.304,
    "l": 46.471
  },
  "oklch": {
    "l": 0.60579,
    "c": 0.08694,
    "h": 228.2
  },
  "luminance": 0.22855
}

Semantic roles & 50–950 ramp

primary

#428CAB

secondary

#C09988

accent

#7A54D4

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428CAB

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

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