#428DBD#428DBD

#428DBD is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.7% C 0.104 H 239.6°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#428DBD
RGB	rgb(66, 141, 189)
HSL	hsl(203, 48%, 50%)
HSV	hsv(203, 65%, 74%)
CMYK	cmyk(65.1%, 25.4%, 0%, 25.9%)
CIE-LAB	lab(55.97, -8.16, -31.89)
CIE-LCH	lch(55.97, 32.91, 255.65°)
OKLab	oklab(61.66% -0.0526 -0.0896)
OKLCH	oklch(61.66% 0.104 239.6)
XYZ	xyz(20.9534, 23.8800, 51.6393)
Luminance	0.2388 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DBD #BD7242

analogous

#42BDB0 #428DBD #424FBD

triadic

#428DBD #BD428D #8DBD42

tetradic

#428DBD #B042BD #BD7242 #4FBD42

square

#428DBD #B042BD #BD7242 #4FBD42

split-complementary

#428DBD #BD424F #BDB042

monochromatic

#224962 #326B90 #428DBD #6FA8CD #9DC4DD

Accessibility & contrast

On white

3.64

#428DBD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#428DBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DBD

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DBD	#FFFFFF	#000000	##000000
##428DBD	1.00	3.64	5.78	5.78
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778DBF

Deuteranopia (green-blind)

#6681BC

Tritanopia (blue-blind)

#00999D

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428dbd;
/* rgb */ color: rgb(66, 141, 189);
/* oklch */ color: oklch(61.7% 0.104 239.6);

Tailwind

colors: {
  custom: {
    50: '#83aed1',
    500: '#428dbd',
    950: '#000000',
  },
}

SCSS

$custom: #428dbd;
$custom-light: #83aed1;
$custom-dark: #000000;

JSON

{
  "hex": "#428dbd",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 189
  },
  "hsl": {
    "h": 203.415,
    "s": 48.235,
    "l": 50
  },
  "oklch": {
    "l": 0.61658,
    "c": 0.10394,
    "h": 239.6
  },
  "luminance": 0.23882
}

Semantic roles & 50–950 ramp

primary

#428DBD

secondary

#C9A792

accent

#8550D8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428DBD

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

Preview Lab → · Contrast checker → · Palette generator →