#428FBF#428FBF

#428FBF is a light, moderate cyan. Relative luminance 0.246; OKLCH L 62.2% C 0.105 H 239.0°. Best body text is #000000 at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#428FBF
RGB	rgb(66, 143, 191)
HSL	hsl(203, 49%, 50%)
HSV	hsv(203, 65%, 75%)
CMYK	cmyk(65.4%, 25.1%, 0%, 25.1%)
CIE-LAB	lab(56.65, -8.62, -31.96)
CIE-LCH	lch(56.65, 33.11, 254.90°)
OKLab	oklab(62.22% -0.054 -0.0899)
OKLCH	oklch(62.22% 0.105 239)
XYZ	xyz(21.4696, 24.5625, 52.8897)
Luminance	0.2457 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FBF #BF7242

analogous

#42BFB0 #428FBF #4250BF

triadic

#428FBF #BF428F #8FBF42

tetradic

#428FBF #B042BF #BF7242 #50BF42

square

#428FBF #B042BF #BF7242 #50BF42

split-complementary

#428FBF #BF4250 #BFB042

monochromatic

#224B65 #326D92 #428FBF #70AACE #9DC5DE

Accessibility & contrast

On white

3.55

#428FBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.91

#428FBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FBF

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FBF	#FFFFFF	#000000	##000000
##428FBF	1.00	3.55	5.91	5.91
#FFFFFF	3.55	1.00	21.00	21.00
#000000	5.91	21.00	1.00	1.00
##000000	5.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798FC1

Deuteranopia (green-blind)

#6882BE

Tritanopia (blue-blind)

#009B9F

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428fbf;
/* rgb */ color: rgb(66, 143, 191);
/* oklch */ color: oklch(62.2% 0.105 239.0);

Tailwind

colors: {
  custom: {
    50: '#83afd2',
    500: '#428fbf',
    950: '#000000',
  },
}

SCSS

$custom: #428fbf;
$custom-light: #83afd2;
$custom-dark: #000000;

JSON

{
  "hex": "#428fbf",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 191
  },
  "hsl": {
    "h": 203.04,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.62225,
    "c": 0.10485,
    "h": 239
  },
  "luminance": 0.24565
}

Semantic roles & 50–950 ramp

primary

#428FBF

secondary

#CAA893

accent

#844FD9

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428FBF

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

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