#428FD2#428FD2

#428FD2 is a light, vivid cyan. Relative luminance 0.255; OKLCH L 63.2% C 0.127 H 247.7°. Best body text is #000000 at 6.09:1 contrast (WCAG AA passes).

Color values

HEX	#428FD2
RGB	rgb(66, 143, 210)
HSL	hsl(208, 62%, 54%)
HSV	hsv(208, 69%, 82%)
CMYK	cmyk(68.6%, 31.9%, 0%, 17.6%)
CIE-LAB	lab(57.51, -2.18, -41.33)
CIE-LCH	lch(57.51, 41.38, 266.98°)
OKLab	oklab(63.2% -0.0481 -0.117)
OKLCH	oklch(63.2% 0.127 247.7)
XYZ	xyz(23.6977, 25.4538, 64.6244)
Luminance	0.2546 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FD2 #D28542

analogous

#42D2CD #428FD2 #4247D2

triadic

#428FD2 #D2428F #8FD242

tetradic

#428FD2 #CD42D2 #D28542 #47D242

square

#428FD2 #CD42D2 #D28542 #47D242

split-complementary

#428FD2 #D24247 #D2CD42

monochromatic

#1E507C #2970AD #428FD2 #73ACDE #A5CAEA

Accessibility & contrast

On white

3.45

#428FD2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.09

#428FD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FD2

6.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FD2	#FFFFFF	#000000	##000000
##428FD2	1.00	3.45	6.09	6.09
#FFFFFF	3.45	1.00	21.00	21.00
#000000	6.09	21.00	1.00	1.00
##000000	6.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7192D5

Deuteranopia (green-blind)

#5D84D1

Tritanopia (blue-blind)

#009FA7

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428fd2;
/* rgb */ color: rgb(66, 143, 210);
/* oklch */ color: oklch(63.2% 0.127 247.7);

Tailwind

colors: {
  custom: {
    50: '#86afe0',
    500: '#428fd2',
    950: '#000000',
  },
}

SCSS

$custom: #428fd2;
$custom-light: #86afe0;
$custom-dark: #000000;

JSON

{
  "hex": "#428fd2",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 210
  },
  "hsl": {
    "h": 207.917,
    "s": 61.538,
    "l": 54.118
  },
  "oklch": {
    "l": 0.63197,
    "c": 0.12653,
    "h": 247.7
  },
  "luminance": 0.25456
}

Semantic roles & 50–950 ramp

primary

#428FD2

secondary

#D7B699

accent

#8E43E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428FD2

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

Preview Lab → · Contrast checker → · Palette generator →