#428DB0#428DB0

#428DB0 is a mid, moderate cyan. Relative luminance 0.233; OKLCH L 61.0% C 0.091 H 231.1°. Best body text is #000000 at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#428DB0
RGB	rgb(66, 141, 176)
HSL	hsl(199, 45%, 47%)
HSV	hsv(199, 63%, 69%)
CMYK	cmyk(62.5%, 19.9%, 0%, 31%)
CIE-LAB	lab(55.42, -12.43, -25.32)
CIE-LCH	lch(55.42, 28.21, 243.86°)
OKLab	oklab(61.04% -0.0572 -0.0708)
OKLCH	oklch(61.04% 0.091 231.1)
XYZ	xyz(19.6051, 23.3406, 44.5379)
Luminance	0.2334 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DB0 #B06542

analogous

#42B09C #428DB0 #4256B0

triadic

#428DB0 #B0428D #8DB042

tetradic

#428DB0 #9C42B0 #B06542 #56B042

square

#428DB0 #9C42B0 #B06542 #56B042

split-complementary

#428DB0 #B04256 #B09C42

monochromatic

#214657 #316983 #428DB0 #69A9C7 #95C2D7

Accessibility & contrast

On white

3.70

#428DB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.67

#428DB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DB0

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DB0	#FFFFFF	#000000	##000000
##428DB0	1.00	3.70	5.67	5.67
#FFFFFF	3.70	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)

#7B8BB2

Deuteranopia (green-blind)

#6C80B0

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428db0;
/* rgb */ color: rgb(66, 141, 176);
/* oklch */ color: oklch(61.0% 0.091 231.1);

Tailwind

colors: {
  custom: {
    50: '#81aec7',
    500: '#428db0',
    950: '#000000',
  },
}

SCSS

$custom: #428db0;
$custom-light: #81aec7;
$custom-dark: #000000;

JSON

{
  "hex": "#428db0",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 176
  },
  "hsl": {
    "h": 199.091,
    "s": 45.455,
    "l": 47.451
  },
  "oklch": {
    "l": 0.61044,
    "c": 0.09098,
    "h": 231.1
  },
  "luminance": 0.23343
}

Semantic roles & 50–950 ramp

primary

#428DB0

secondary

#C39D8B

accent

#7C53D5

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428DB0

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

Preview Lab → · Contrast checker → · Palette generator →