#428FBB#428FBB

#428FBB is a light, moderate cyan. Relative luminance 0.244; OKLCH L 62.0% C 0.101 H 236.6°. Best body text is #000000 at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#428FBB
RGB	rgb(66, 143, 187)
HSL	hsl(202, 48%, 50%)
HSV	hsv(202, 65%, 73%)
CMYK	cmyk(64.7%, 23.5%, 0%, 26.7%)
CIE-LAB	lab(56.48, -9.95, -29.96)
CIE-LCH	lch(56.48, 31.57, 251.63°)
OKLab	oklab(62.03% -0.0554 -0.0841)
OKLCH	oklch(62.03% 0.101 236.6)
XYZ	xyz(21.0354, 24.3889, 50.6030)
Luminance	0.2439 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FBB #BB6E42

analogous

#42BBAB #428FBB #4253BB

triadic

#428FBB #BB428F #8FBB42

tetradic

#428FBB #AB42BB #BB6E42 #53BB42

square

#428FBB #AB42BB #BB6E42 #53BB42

split-complementary

#428FBB #BB4253 #BBAB42

monochromatic

#224A61 #326C8E #428FBB #6EAACC #9CC4DC

Accessibility & contrast

On white

3.57

#428FBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.88

#428FBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FBB

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FBB	#FFFFFF	#000000	##000000
##428FBB	1.00	3.57	5.88	5.88
#FFFFFF	3.57	1.00	21.00	21.00
#000000	5.88	21.00	1.00	1.00
##000000	5.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8EBD

Deuteranopia (green-blind)

#6A82BA

Tritanopia (blue-blind)

#009A9E

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428fbb;
/* rgb */ color: rgb(66, 143, 187);
/* oklch */ color: oklch(62.0% 0.101 236.6);

Tailwind

colors: {
  custom: {
    50: '#83afcf',
    500: '#428fbb',
    950: '#000000',
  },
}

SCSS

$custom: #428fbb;
$custom-light: #83afcf;
$custom-dark: #000000;

JSON

{
  "hex": "#428fbb",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 187
  },
  "hsl": {
    "h": 201.818,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.62033,
    "c": 0.10069,
    "h": 236.6
  },
  "luminance": 0.24391
}

Semantic roles & 50–950 ramp

primary

#428FBB

secondary

#C8A591

accent

#8150D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428FBB

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

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