#428FB7#428FB7

#428FB7 is a mid, moderate cyan. Relative luminance 0.242; OKLCH L 61.8% C 0.097 H 234.0°. Best body text is #000000 at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#428FB7
RGB	rgb(66, 143, 183)
HSL	hsl(201, 47%, 49%)
HSV	hsv(201, 64%, 72%)
CMYK	cmyk(63.9%, 21.9%, 0%, 28.2%)
CIE-LAB	lab(56.31, -11.27, -27.95)
CIE-LCH	lch(56.31, 30.13, 248.04°)
OKLab	oklab(61.84% -0.0568 -0.0783)
OKLCH	oklch(61.84% 0.097 234)
XYZ	xyz(20.6132, 24.2200, 48.3792)
Luminance	0.2422 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FB7 #B76A42

analogous

#42B7A5 #428FB7 #4255B7

triadic

#428FB7 #B7428F #8FB742

tetradic

#428FB7 #A542B7 #B76A42 #55B742

square

#428FB7 #A542B7 #B76A42 #55B742

split-complementary

#428FB7 #B74255 #B7A542

monochromatic

#22495D #326C8A #428FB7 #6CAACA #99C4DA

Accessibility & contrast

On white

3.59

#428FB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.84

#428FB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FB7

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FB7	#FFFFFF	#000000	##000000
##428FB7	1.00	3.59	5.84	5.84
#FFFFFF	3.59	1.00	21.00	21.00
#000000	5.84	21.00	1.00	1.00
##000000	5.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8EB9

Deuteranopia (green-blind)

#6B82B6

Tritanopia (blue-blind)

#009A9C

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428fb7;
/* rgb */ color: rgb(66, 143, 183);
/* oklch */ color: oklch(61.8% 0.097 234.0);

Tailwind

colors: {
  custom: {
    50: '#82afcc',
    500: '#428fb7',
    950: '#000000',
  },
}

SCSS

$custom: #428fb7;
$custom-light: #82afcc;
$custom-dark: #000000;

JSON

{
  "hex": "#428fb7",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 183
  },
  "hsl": {
    "h": 200.513,
    "s": 46.988,
    "l": 48.824
  },
  "oklch": {
    "l": 0.61844,
    "c": 0.09672,
    "h": 234
  },
  "luminance": 0.24222
}

Semantic roles & 50–950 ramp

primary

#428FB7

secondary

#C6A28F

accent

#7F51D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428FB7

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

Preview Lab → · Contrast checker → · Palette generator →