#428FBD#428FBD

#428FBD is a light, moderate cyan. Relative luminance 0.245; OKLCH L 62.1% C 0.103 H 237.8°. Best body text is #000000 at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#428FBD
RGB	rgb(66, 143, 189)
HSL	hsl(202, 48%, 50%)
HSV	hsv(202, 65%, 74%)
CMYK	cmyk(65.1%, 24.3%, 0%, 25.9%)
CIE-LAB	lab(56.56, -9.29, -30.96)
CIE-LCH	lch(56.56, 32.33, 253.30°)
OKLab	oklab(62.13% -0.0547 -0.087)
OKLCH	oklch(62.13% 0.103 237.8)
XYZ	xyz(21.2510, 24.4751, 51.7385)
Luminance	0.2448 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FBD #BD7042

analogous

#42BDAD #428FBD #4252BD

triadic

#428FBD #BD428F #8FBD42

tetradic

#428FBD #AD42BD #BD7042 #52BD42

square

#428FBD #AD42BD #BD7042 #52BD42

split-complementary

#428FBD #BD4252 #BDAD42

monochromatic

#224A62 #326D90 #428FBD #6FAACD #9DC5DD

Accessibility & contrast

On white

3.56

#428FBD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.90

#428FBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FBD

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FBD	#FFFFFF	#000000	##000000
##428FBD	1.00	3.56	5.90	5.90
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.90	21.00	1.00	1.00
##000000	5.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8FBF

Deuteranopia (green-blind)

#6982BC

Tritanopia (blue-blind)

#009B9F

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428fbd;
/* rgb */ color: rgb(66, 143, 189);
/* oklch */ color: oklch(62.1% 0.103 237.8);

Tailwind

colors: {
  custom: {
    50: '#83afd1',
    500: '#428fbd',
    950: '#000000',
  },
}

SCSS

$custom: #428fbd;
$custom-light: #83afd1;
$custom-dark: #000000;

JSON

{
  "hex": "#428fbd",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 189
  },
  "hsl": {
    "h": 202.439,
    "s": 48.235,
    "l": 50
  },
  "oklch": {
    "l": 0.62128,
    "c": 0.10275,
    "h": 237.8
  },
  "luminance": 0.24477
}

Semantic roles & 50–950 ramp

primary

#428FBD

secondary

#C9A692

accent

#8350D8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428FBD

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

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