#428CB0#428CB0

#428CB0 is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.8% C 0.091 H 232.1°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#428CB0
RGB	rgb(66, 140, 176)
HSL	hsl(200, 45%, 47%)
HSV	hsv(200, 63%, 69%)
CMYK	cmyk(62.5%, 20.5%, 0%, 31%)
CIE-LAB	lab(55.12, -11.87, -25.79)
CIE-LCH	lch(55.12, 28.39, 245.28°)
OKLab	oklab(60.81% -0.0561 -0.0721)
OKLCH	oklch(60.81% 0.091 232.1)
XYZ	xyz(19.4583, 23.0471, 44.4889)
Luminance	0.2305 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CB0 #B06642

analogous

#42B09D #428CB0 #4255B0

triadic

#428CB0 #B0428C #8CB042

tetradic

#428CB0 #9D42B0 #B06642 #55B042

square

#428CB0 #9D42B0 #B06642 #55B042

split-complementary

#428CB0 #B04255 #B09D42

monochromatic

#214557 #316983 #428CB0 #69A8C7 #95C2D7

Accessibility & contrast

On white

3.74

#428CB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.61

#428CB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CB0

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CB0	#FFFFFF	#000000	##000000
##428CB0	1.00	3.74	5.61	5.61
#FFFFFF	3.74	1.00	21.00	21.00
#000000	5.61	21.00	1.00	1.00
##000000	5.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8AB2

Deuteranopia (green-blind)

#6B7FAF

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428cb0;
/* rgb */ color: rgb(66, 140, 176);
/* oklch */ color: oklch(60.8% 0.091 232.1);

Tailwind

colors: {
  custom: {
    50: '#81adc7',
    500: '#428cb0',
    950: '#000000',
  },
}

SCSS

$custom: #428cb0;
$custom-light: #81adc7;
$custom-dark: #000000;

JSON

{
  "hex": "#428cb0",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 176
  },
  "hsl": {
    "h": 199.636,
    "s": 45.455,
    "l": 47.451
  },
  "oklch": {
    "l": 0.60805,
    "c": 0.09135,
    "h": 232.1
  },
  "luminance": 0.23049
}

Semantic roles & 50–950 ramp

primary

#428CB0

secondary

#C39D8B

accent

#7D53D5

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428CB0

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

Preview Lab → · Contrast checker → · Palette generator →