#428BA3#428BA3

#428BA3 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.0% C 0.081 H 222.3°. Best body text is #000000 at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#428BA3
RGB	rgb(66, 139, 163)
HSL	hsl(195, 42%, 45%)
HSV	hsv(195, 60%, 64%)
CMYK	cmyk(59.5%, 14.7%, 0%, 36.1%)
CIE-LAB	lab(54.31, -15.46, -19.58)
CIE-LCH	lch(54.31, 24.94, 231.71°)
OKLab	oklab(59.99% -0.0599 -0.0544)
OKLCH	oklch(59.99% 0.081 222.3)
XYZ	xyz(18.0876, 22.2661, 37.9878)
Luminance	0.2227 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BA3 #A35A42

analogous

#42A38A #428BA3 #425BA3

triadic

#428BA3 #A3428B #8BA342

tetradic

#428BA3 #8A42A3 #A35A42 #5BA342

square

#428BA3 #8A42A3 #A35A42 #5BA342

split-complementary

#428BA3 #A3425B #A38A42

monochromatic

#1F414C #306677 #428BA3 #63A9C0 #8EC1D1

Accessibility & contrast

On white

3.85

#428BA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.45

#428BA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BA3

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BA3	#FFFFFF	#000000	##000000
##428BA3	1.00	3.85	5.45	5.45
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.45	21.00	1.00	1.00
##000000	5.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D88A4

Deuteranopia (green-blind)

#6F7DA3

Tritanopia (blue-blind)

#009393

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #428ba3;
/* rgb */ color: rgb(66, 139, 163);
/* oklch */ color: oklch(60.0% 0.081 222.3);

Tailwind

colors: {
  custom: {
    50: '#7fadbe',
    500: '#428ba3',
    950: '#000000',
  },
}

SCSS

$custom: #428ba3;
$custom-light: #7fadbe;
$custom-dark: #000000;

JSON

{
  "hex": "#428ba3",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 163
  },
  "hsl": {
    "h": 194.845,
    "s": 42.358,
    "l": 44.902
  },
  "oklch": {
    "l": 0.59988,
    "c": 0.08095,
    "h": 222.3
  },
  "luminance": 0.22268
}

Semantic roles & 50–950 ramp

primary

#428BA3

secondary

#BC9284

accent

#7456D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428BA3

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

Preview Lab → · Contrast checker → · Palette generator →