#428CBD#428CBD

#428CBD is a mid, moderate cyan. Relative luminance 0.236; OKLCH L 61.4% C 0.105 H 240.5°. Best body text is #000000 at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#428CBD
RGB	rgb(66, 140, 189)
HSL	hsl(204, 48%, 50%)
HSV	hsv(204, 65%, 74%)
CMYK	cmyk(65.1%, 25.9%, 0%, 25.9%)
CIE-LAB	lab(55.67, -7.59, -32.35)
CIE-LCH	lch(55.67, 33.23, 256.80°)
OKLab	oklab(61.42% -0.0515 -0.091)
OKLCH	oklch(61.42% 0.105 240.5)
XYZ	xyz(20.8067, 23.5864, 51.5904)
Luminance	0.2359 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CBD #BD7342

analogous

#42BDB0 #428CBD #424FBD

triadic

#428CBD #BD428C #8CBD42

tetradic

#428CBD #B042BD #BD7342 #4FBD42

square

#428CBD #B042BD #BD7342 #4FBD42

split-complementary

#428CBD #BD424F #BDB042

monochromatic

#224962 #326A90 #428CBD #6FA8CD #9DC3DD

Accessibility & contrast

On white

3.67

#428CBD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.72

#428CBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CBD

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CBD	#FFFFFF	#000000	##000000
##428CBD	1.00	3.67	5.72	5.72
#FFFFFF	3.67	1.00	21.00	21.00
#000000	5.72	21.00	1.00	1.00
##000000	5.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#768CBF

Deuteranopia (green-blind)

#6580BC

Tritanopia (blue-blind)

#00989D

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428cbd;
/* rgb */ color: rgb(66, 140, 189);
/* oklch */ color: oklch(61.4% 0.105 240.5);

Tailwind

colors: {
  custom: {
    50: '#83add1',
    500: '#428cbd',
    950: '#000000',
  },
}

SCSS

$custom: #428cbd;
$custom-light: #83add1;
$custom-dark: #000000;

JSON

{
  "hex": "#428cbd",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 189
  },
  "hsl": {
    "h": 203.902,
    "s": 48.235,
    "l": 50
  },
  "oklch": {
    "l": 0.61424,
    "c": 0.10457,
    "h": 240.5
  },
  "luminance": 0.23589
}

Semantic roles & 50–950 ramp

primary

#428CBD

secondary

#C9A892

accent

#8650D8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428CBD

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

Preview Lab → · Contrast checker → · Palette generator →