#428FBA#428FBA

#428FBA is a mid, moderate cyan. Relative luminance 0.243; OKLCH L 62.0% C 0.100 H 236.0°. Best body text is #000000 at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#428FBA
RGB	rgb(66, 143, 186)
HSL	hsl(202, 48%, 49%)
HSV	hsv(202, 65%, 73%)
CMYK	cmyk(64.5%, 23.1%, 0%, 27.1%)
CIE-LAB	lab(56.43, -10.28, -29.46)
CIE-LCH	lch(56.43, 31.20, 250.76°)
OKLab	oklab(61.99% -0.0557 -0.0826)
OKLCH	oklch(61.99% 0.1 236)
XYZ	xyz(20.9287, 24.3462, 50.0412)
Luminance	0.2435 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FBA #BA6D42

analogous

#42BAA9 #428FBA #4253BA

triadic

#428FBA #BA428F #8FBA42

tetradic

#428FBA #A942BA #BA6D42 #53BA42

square

#428FBA #A942BA #BA6D42 #53BA42

split-complementary

#428FBA #BA4253 #BAA942

monochromatic

#224A60 #326C8D #428FBA #6EAACB #9BC4DB

Accessibility & contrast

On white

3.58

#428FBA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.87

#428FBA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FBA

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FBA	#FFFFFF	#000000	##000000
##428FBA	1.00	3.58	5.87	5.87
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.87	21.00	1.00	1.00
##000000	5.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8EBC

Deuteranopia (green-blind)

#6A82B9

Tritanopia (blue-blind)

#009A9D

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428fba;
/* rgb */ color: rgb(66, 143, 186);
/* oklch */ color: oklch(62.0% 0.100 236.0);

Tailwind

colors: {
  custom: {
    50: '#82afcf',
    500: '#428fba',
    950: '#000000',
  },
}

SCSS

$custom: #428fba;
$custom-light: #82afcf;
$custom-dark: #000000;

JSON

{
  "hex": "#428fba",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 186
  },
  "hsl": {
    "h": 201.5,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.61985,
    "c": 0.09968,
    "h": 236
  },
  "luminance": 0.24348
}

Semantic roles & 50–950 ramp

primary

#428FBA

secondary

#C8A490

accent

#8151D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1013

muted

#7D7F82

Preview Lab

Preview with #428FBA

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

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