#428CAF#428CAF

#428CAF is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.8% C 0.090 H 231.4°. Best body text is #000000 at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#428CAF
RGB	rgb(66, 140, 175)
HSL	hsl(199, 45%, 47%)
HSV	hsv(199, 62%, 69%)
CMYK	cmyk(62.3%, 20%, 0%, 31.4%)
CIE-LAB	lab(55.08, -12.19, -25.28)
CIE-LCH	lch(55.08, 28.06, 244.25°)
OKLab	oklab(60.76% -0.0564 -0.0707)
OKLCH	oklch(60.76% 0.09 231.4)
XYZ	xyz(19.3597, 23.0076, 43.9698)
Luminance	0.2301 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CAF #AF6542

analogous

#42AF9C #428CAF #4256AF

triadic

#428CAF #AF428C #8CAF42

tetradic

#428CAF #9C42AF #AF6542 #56AF42

square

#428CAF #9C42AF #AF6542 #56AF42

split-complementary

#428CAF #AF4256 #AF9C42

monochromatic

#204556 #316883 #428CAF #68A8C6 #95C2D7

Accessibility & contrast

On white

3.75

#428CAF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.60

#428CAF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CAF

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CAF	#FFFFFF	#000000	##000000
##428CAF	1.00	3.75	5.60	5.60
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.60	21.00	1.00	1.00
##000000	5.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8AB1

Deuteranopia (green-blind)

#6B7FAE

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428caf;
/* rgb */ color: rgb(66, 140, 175);
/* oklch */ color: oklch(60.8% 0.090 231.4);

Tailwind

colors: {
  custom: {
    50: '#81adc7',
    500: '#428caf',
    950: '#000000',
  },
}

SCSS

$custom: #428caf;
$custom-light: #81adc7;
$custom-dark: #000000;

JSON

{
  "hex": "#428caf",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 175
  },
  "hsl": {
    "h": 199.266,
    "s": 45.228,
    "l": 47.255
  },
  "oklch": {
    "l": 0.60759,
    "c": 0.09043,
    "h": 231.4
  },
  "luminance": 0.2301
}

Semantic roles & 50–950 ramp

primary

#428CAF

secondary

#C29C8A

accent

#7D53D5

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428CAF

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

Preview Lab → · Contrast checker → · Palette generator →