#428BA8#428BA8

#428BA8 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.2% C 0.085 H 226.8°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#428BA8
RGB	rgb(66, 139, 168)
HSL	hsl(197, 44%, 46%)
HSV	hsv(197, 61%, 66%)
CMYK	cmyk(60.7%, 17.3%, 0%, 34.1%)
CIE-LAB	lab(54.50, -13.88, -22.16)
CIE-LCH	lch(54.50, 26.15, 237.93°)
OKLab	oklab(60.21% -0.058 -0.0618)
OKLCH	oklch(60.21% 0.085 226.8)
XYZ	xyz(18.5445, 22.4488, 40.3940)
Luminance	0.2245 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BA8 #A85F42

analogous

#42A892 #428BA8 #4258A8

triadic

#428BA8 #A8428B #8BA842

tetradic

#428BA8 #9242A8 #A85F42 #58A842

square

#428BA8 #9242A8 #A85F42 #58A842

split-complementary

#428BA8 #A84258 #A89242

monochromatic

#1F4250 #31677C #428BA8 #65A8C2 #91C1D4

Accessibility & contrast

On white

3.82

#428BA8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#428BA8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BA8

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BA8	#FFFFFF	#000000	##000000
##428BA8	1.00	3.82	5.49	5.49
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C88A9

Deuteranopia (green-blind)

#6D7EA8

Tritanopia (blue-blind)

#009394

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #428ba8;
/* rgb */ color: rgb(66, 139, 168);
/* oklch */ color: oklch(60.2% 0.085 226.8);

Tailwind

colors: {
  custom: {
    50: '#80adc2',
    500: '#428ba8',
    950: '#000000',
  },
}

SCSS

$custom: #428ba8;
$custom-light: #80adc2;
$custom-dark: #000000;

JSON

{
  "hex": "#428ba8",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 168
  },
  "hsl": {
    "h": 197.059,
    "s": 43.59,
    "l": 45.882
  },
  "oklch": {
    "l": 0.60205,
    "c": 0.0847,
    "h": 226.8
  },
  "luminance": 0.22451
}

Semantic roles & 50–950 ramp

primary

#428BA8

secondary

#BF9787

accent

#7954D3

background

#F8FAFB

surface

#EFF4F7

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428BA8

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

Preview Lab → · Contrast checker → · Palette generator →