#428CB7#428CB7

#428CB7 is a mid, moderate cyan. Relative luminance 0.233; OKLCH L 61.1% C 0.098 H 236.9°. Best body text is #000000 at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#428CB7
RGB	rgb(66, 140, 183)
HSL	hsl(202, 47%, 49%)
HSV	hsv(202, 64%, 72%)
CMYK	cmyk(63.9%, 23.5%, 0%, 28.2%)
CIE-LAB	lab(55.41, -9.58, -29.33)
CIE-LCH	lch(55.41, 30.86, 251.91°)
OKLab	oklab(61.13% -0.0536 -0.0823)
OKLCH	oklch(61.13% 0.098 236.9)
XYZ	xyz(20.1688, 23.3313, 48.2310)
Luminance	0.2333 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CB7 #B76D42

analogous

#42B7A8 #428CB7 #4252B7

triadic

#428CB7 #B7428C #8CB742

tetradic

#428CB7 #A842B7 #B76D42 #52B742

square

#428CB7 #A842B7 #B76D42 #52B742

split-complementary

#428CB7 #B74252 #B7A842

monochromatic

#22475D #326A8A #428CB7 #6CA8CA #99C2DA

Accessibility & contrast

On white

3.71

#428CB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.67

#428CB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CB7

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CB7	#FFFFFF	#000000	##000000
##428CB7	1.00	3.71	5.67	5.67
#FFFFFF	3.71	1.00	21.00	21.00
#000000	5.67	21.00	1.00	1.00
##000000	5.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788BB9

Deuteranopia (green-blind)

#6880B6

Tritanopia (blue-blind)

#00979B

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428cb7;
/* rgb */ color: rgb(66, 140, 183);
/* oklch */ color: oklch(61.1% 0.098 236.9);

Tailwind

colors: {
  custom: {
    50: '#82adcc',
    500: '#428cb7',
    950: '#000000',
  },
}

SCSS

$custom: #428cb7;
$custom-light: #82adcc;
$custom-dark: #000000;

JSON

{
  "hex": "#428cb7",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 183
  },
  "hsl": {
    "h": 202.051,
    "s": 46.988,
    "l": 48.824
  },
  "oklch": {
    "l": 0.61132,
    "c": 0.0982,
    "h": 236.9
  },
  "luminance": 0.23333
}

Semantic roles & 50–950 ramp

primary

#428CB7

secondary

#C6A38F

accent

#8251D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428CB7

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

Preview Lab → · Contrast checker → · Palette generator →