#428D9D#428D9D

#428D9D is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.2% C 0.078 H 213.6°. Best body text is #000000 at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#428D9D
RGB	rgb(66, 141, 157)
HSL	hsl(191, 41%, 44%)
HSV	hsv(191, 58%, 62%)
CMYK	cmyk(58%, 10.2%, 0%, 38.4%)
CIE-LAB	lab(54.70, -18.38, -15.52)
CIE-LCH	lch(54.70, 24.06, 220.18°)
OKLab	oklab(60.23% -0.0646 -0.043)
OKLCH	oklch(60.23% 0.078 213.6)
XYZ	xyz(17.8550, 22.6406, 35.3209)
Luminance	0.2264 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428D9D #9D5242

analogous

#429D7F #428D9D #425F9D

triadic

#428D9D #9D428D #8D9D42

tetradic

#428D9D #7F429D #9D5242 #5F9D42

square

#428D9D #7F429D #9D5242 #5F9D42

split-complementary

#428D9D #9D425F #9D7F42

monochromatic

#1E4047 #306672 #428D9D #60ACBC #8BC2CE

Accessibility & contrast

On white

3.80

#428D9D on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.53

#428D9D on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428D9D

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428D9D	#FFFFFF	#000000	##000000
##428D9D	1.00	3.80	5.53	5.53
#FFFFFF	3.80	1.00	21.00	21.00
#000000	5.53	21.00	1.00	1.00
##000000	5.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#81899E

Deuteranopia (green-blind)

#737E9D

Tritanopia (blue-blind)

#009392

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428d9d;
/* rgb */ color: rgb(66, 141, 157);
/* oklch */ color: oklch(60.2% 0.078 213.6);

Tailwind

colors: {
  custom: {
    50: '#7faeba',
    500: '#428d9d',
    950: '#000000',
  },
}

SCSS

$custom: #428d9d;
$custom-light: #7faeba;
$custom-dark: #000000;

JSON

{
  "hex": "#428d9d",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 157
  },
  "hsl": {
    "h": 190.549,
    "s": 40.807,
    "l": 43.725
  },
  "oklch": {
    "l": 0.60229,
    "c": 0.07764,
    "h": 213.6
  },
  "luminance": 0.22642
}

Semantic roles & 50–950 ramp

primary

#428D9D

secondary

#B98B82

accent

#6D57D1

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1011

muted

#7C7F80

Preview Lab

Preview with #428D9D

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

Preview Lab → · Contrast checker → · Palette generator →