#428FB9#428FB9

#428FB9 is a mid, moderate cyan. Relative luminance 0.243; OKLCH L 61.9% C 0.099 H 235.4°. Best body text is #000000 at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#428FB9
RGB	rgb(66, 143, 185)
HSL	hsl(201, 47%, 49%)
HSV	hsv(201, 64%, 73%)
CMYK	cmyk(64.3%, 22.7%, 0%, 27.5%)
CIE-LAB	lab(56.39, -10.61, -28.96)
CIE-LCH	lch(56.39, 30.84, 249.88°)
OKLab	oklab(61.94% -0.0561 -0.0812)
OKLCH	oklch(61.94% 0.099 235.4)
XYZ	xyz(20.8228, 24.3038, 49.4833)
Luminance	0.2431 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FB9 #B96C42

analogous

#42B9A7 #428FB9 #4254B9

triadic

#428FB9 #B9428F #8FB942

tetradic

#428FB9 #A742B9 #B96C42 #54B942

square

#428FB9 #A742B9 #B96C42 #54B942

split-complementary

#428FB9 #B94254 #B9A742

monochromatic

#22495F #326C8C #428FB9 #6DAACB #9AC4DB

Accessibility & contrast

On white

3.58

#428FB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.86

#428FB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FB9

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FB9	#FFFFFF	#000000	##000000
##428FB9	1.00	3.58	5.86	5.86
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.86	21.00	1.00	1.00
##000000	5.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8EBB

Deuteranopia (green-blind)

#6B82B8

Tritanopia (blue-blind)

#009A9D

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428fb9;
/* rgb */ color: rgb(66, 143, 185);
/* oklch */ color: oklch(61.9% 0.099 235.4);

Tailwind

colors: {
  custom: {
    50: '#82afce',
    500: '#428fb9',
    950: '#000000',
  },
}

SCSS

$custom: #428fb9;
$custom-light: #82afce;
$custom-dark: #000000;

JSON

{
  "hex": "#428fb9",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 185
  },
  "hsl": {
    "h": 201.176,
    "s": 47.41,
    "l": 49.216
  },
  "oklch": {
    "l": 0.61938,
    "c": 0.09868,
    "h": 235.4
  },
  "luminance": 0.24306
}

Semantic roles & 50–950 ramp

primary

#428FB9

secondary

#C7A390

accent

#8051D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1013

muted

#7D7F82

Preview Lab

Preview with #428FB9

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

Preview Lab → · Contrast checker → · Palette generator →