#428DB2#428DB2

#428DB2 is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 61.1% C 0.093 H 232.6°. Best body text is #000000 at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#428DB2
RGB	rgb(66, 141, 178)
HSL	hsl(200, 46%, 48%)
HSV	hsv(200, 63%, 70%)
CMYK	cmyk(62.9%, 20.8%, 0%, 30.2%)
CIE-LAB	lab(55.50, -11.78, -26.34)
CIE-LCH	lch(55.50, 28.85, 245.91°)
OKLab	oklab(61.14% -0.0564 -0.0737)
OKLCH	oklch(61.14% 0.093 232.6)
XYZ	xyz(19.8044, 23.4204, 45.5877)
Luminance	0.2342 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DB2 #B26742

analogous

#42B29F #428DB2 #4255B2

triadic

#428DB2 #B2428D #8DB242

tetradic

#428DB2 #9F42B2 #B26742 #55B242

square

#428DB2 #9F42B2 #B26742 #55B242

split-complementary

#428DB2 #B24255 #B29F42

monochromatic

#214659 #316A85 #428DB2 #6AA9C8 #96C2D8

Accessibility & contrast

On white

3.69

#428DB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.68

#428DB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DB2

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DB2	#FFFFFF	#000000	##000000
##428DB2	1.00	3.69	5.68	5.68
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.68	21.00	1.00	1.00
##000000	5.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8BB4

Deuteranopia (green-blind)

#6B80B1

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428db2;
/* rgb */ color: rgb(66, 141, 178);
/* oklch */ color: oklch(61.1% 0.093 232.6);

Tailwind

colors: {
  custom: {
    50: '#81aec9',
    500: '#428db2',
    950: '#000000',
  },
}

SCSS

$custom: #428db2;
$custom-light: #81aec9;
$custom-dark: #000000;

JSON

{
  "hex": "#428db2",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 178
  },
  "hsl": {
    "h": 199.821,
    "s": 45.902,
    "l": 47.843
  },
  "oklch": {
    "l": 0.61136,
    "c": 0.09283,
    "h": 232.6
  },
  "luminance": 0.23422
}

Semantic roles & 50–950 ramp

primary

#428DB2

secondary

#C49E8C

accent

#7E52D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428DB2

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

Preview Lab → · Contrast checker → · Palette generator →