#428FD5#428FD5

#428FD5 is a light, vivid cyan. Relative luminance 0.256; OKLCH L 63.4% C 0.130 H 248.7°. Best body text is #000000 at 6.12:1 contrast (WCAG AA passes).

Color values

HEX	#428FD5
RGB	rgb(66, 143, 213)
HSL	hsl(209, 64%, 55%)
HSV	hsv(209, 69%, 84%)
CMYK	cmyk(69%, 32.9%, 0%, 16.5%)
CIE-LAB	lab(57.66, -1.14, -42.78)
CIE-LCH	lch(57.66, 42.80, 268.47°)
OKLab	oklab(63.36% -0.0472 -0.1213)
OKLCH	oklch(63.36% 0.13 248.7)
XYZ	xyz(24.0750, 25.6047, 66.6113)
Luminance	0.2561 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FD5 #D58842

analogous

#42D5D1 #428FD5 #4246D5

triadic

#428FD5 #D5428F #8FD542

tetradic

#428FD5 #D142D5 #D58842 #46D542

square

#428FD5 #D142D5 #D58842 #46D542

split-complementary

#428FD5 #D54246 #D5D142

monochromatic

#1C5180 #2870B2 #428FD5 #74ADE0 #A6CAEB

Accessibility & contrast

On white

3.43

#428FD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.12

#428FD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FD5

6.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FD5	#FFFFFF	#000000	##000000
##428FD5	1.00	3.43	6.12	6.12
#FFFFFF	3.43	1.00	21.00	21.00
#000000	6.12	21.00	1.00	1.00
##000000	6.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7092D8

Deuteranopia (green-blind)

#5B84D4

Tritanopia (blue-blind)

#00A0A8

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428fd5;
/* rgb */ color: rgb(66, 143, 213);
/* oklch */ color: oklch(63.4% 0.130 248.7);

Tailwind

colors: {
  custom: {
    50: '#86afe2',
    500: '#428fd5',
    950: '#000000',
  },
}

SCSS

$custom: #428fd5;
$custom-light: #86afe2;
$custom-dark: #000000;

JSON

{
  "hex": "#428fd5",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 213
  },
  "hsl": {
    "h": 208.571,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.63358,
    "c": 0.13015,
    "h": 248.7
  },
  "luminance": 0.25607
}

Semantic roles & 50–950 ramp

primary

#428FD5

secondary

#D8B89A

accent

#9041E7

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428FD5

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

Preview Lab → · Contrast checker → · Palette generator →