#428CD1#428CD1

#428CD1 is a light, vivid cyan. Relative luminance 0.245; OKLCH L 62.5% C 0.128 H 249.2°. Best body text is #000000 at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#428CD1
RGB	rgb(66, 140, 209)
HSL	hsl(209, 61%, 54%)
HSV	hsv(209, 68%, 82%)
CMYK	cmyk(68.4%, 33%, 0%, 18%)
CIE-LAB	lab(56.60, -0.77, -42.21)
CIE-LCH	lch(56.60, 42.21, 268.95°)
OKLab	oklab(62.46% -0.0454 -0.1196)
OKLCH	oklch(62.46% 0.128 249.2)
XYZ	xyz(23.1292, 24.5154, 63.8222)
Luminance	0.2452 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CD1 #D18742

analogous

#42D1CF #428CD1 #4245D1

triadic

#428CD1 #D1428C #8CD142

tetradic

#428CD1 #CF42D1 #D18742 #45D142

square

#428CD1 #CF42D1 #D18742 #45D142

split-complementary

#428CD1 #D14245 #D1CF42

monochromatic

#1E4E7B #2A6DAC #428CD1 #73AADD #A4C8E9

Accessibility & contrast

On white

3.56

#428CD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.90

#428CD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CD1

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CD1	#FFFFFF	#000000	##000000
##428CD1	1.00	3.56	5.90	5.90
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.90	21.00	1.00	1.00
##000000	5.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D8FD4

Deuteranopia (green-blind)

#5982D0

Tritanopia (blue-blind)

#009CA5

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428cd1;
/* rgb */ color: rgb(66, 140, 209);
/* oklch */ color: oklch(62.5% 0.128 249.2);

Tailwind

colors: {
  custom: {
    50: '#86addf',
    500: '#428cd1',
    950: '#000000',
  },
}

SCSS

$custom: #428cd1;
$custom-light: #86addf;
$custom-dark: #000000;

JSON

{
  "hex": "#428cd1",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 209
  },
  "hsl": {
    "h": 208.951,
    "s": 60.851,
    "l": 53.922
  },
  "oklch": {
    "l": 0.62461,
    "c": 0.12796,
    "h": 249.2
  },
  "luminance": 0.24518
}

Semantic roles & 50–950 ramp

primary

#428CD1

secondary

#D6B699

accent

#9144E4

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428CD1

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

Preview Lab → · Contrast checker → · Palette generator →