#428B9A#428B9A

#428B9A is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 59.6% C 0.076 H 212.9°. Best body text is #000000 at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#428B9A
RGB	rgb(66, 139, 154)
HSL	hsl(190, 40%, 43%)
HSV	hsv(190, 57%, 60%)
CMYK	cmyk(57.1%, 9.7%, 0%, 39.6%)
CIE-LAB	lab(53.98, -18.22, -14.89)
CIE-LCH	lch(53.98, 23.53, 219.25°)
OKLab	oklab(59.61% -0.0636 -0.0412)
OKLCH	oklch(59.61% 0.076 212.9)
XYZ	xyz(17.3098, 21.9549, 33.8911)
Luminance	0.2196 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428B9A #9A5142

analogous

#429A7D #428B9A #425F9A

triadic

#428B9A #9A428B #8B9A42

tetradic

#428B9A #7D429A #9A5142 #5F9A42

square

#428B9A #7D429A #9A5142 #5F9A42

split-complementary

#428B9A #9A425F #9A7D42

monochromatic

#1D3E44 #30646F #428B9A #5FABBA #8AC1CD

Accessibility & contrast

On white

3.90

#428B9A on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.39

#428B9A on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428B9A

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428B9A	#FFFFFF	#000000	##000000
##428B9A	1.00	3.90	5.39	5.39
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.39	21.00	1.00	1.00
##000000	5.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F879B

Deuteranopia (green-blind)

#727D9A

Tritanopia (blue-blind)

#009190

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #428b9a;
/* rgb */ color: rgb(66, 139, 154);
/* oklch */ color: oklch(59.6% 0.076 212.9);

Tailwind

colors: {
  custom: {
    50: '#7fadb7',
    500: '#428b9a',
    950: '#000000',
  },
}

SCSS

$custom: #428b9a;
$custom-light: #7fadb7;
$custom-dark: #000000;

JSON

{
  "hex": "#428b9a",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 154
  },
  "hsl": {
    "h": 190.227,
    "s": 40,
    "l": 43.137
  },
  "oklch": {
    "l": 0.59615,
    "c": 0.07579,
    "h": 212.9
  },
  "luminance": 0.21957
}

Semantic roles & 50–950 ramp

primary

#428B9A

secondary

#B88A80

accent

#6C58D0

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1011

muted

#7C7F80

Preview Lab

Preview with #428B9A

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

Preview Lab → · Contrast checker → · Palette generator →