#428FD0#428FD0

#428FD0 is a light, vivid cyan. Relative luminance 0.254; OKLCH L 63.1% C 0.124 H 246.9°. Best body text is #000000 at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#428FD0
RGB	rgb(66, 143, 208)
HSL	hsl(207, 60%, 54%)
HSV	hsv(207, 68%, 82%)
CMYK	cmyk(68.3%, 31.3%, 0%, 18.4%)
CIE-LAB	lab(57.42, -2.87, -40.35)
CIE-LCH	lch(57.42, 40.46, 265.94°)
OKLab	oklab(63.09% -0.0487 -0.1142)
OKLCH	oklch(63.09% 0.124 246.9)
XYZ	xyz(23.4501, 25.3547, 63.3204)
Luminance	0.2536 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FD0 #D08342

analogous

#42D0CA #428FD0 #4248D0

triadic

#428FD0 #D0428F #8FD042

tetradic

#428FD0 #CA42D0 #D08342 #48D042

square

#428FD0 #CA42D0 #D08342 #48D042

split-complementary

#428FD0 #D04248 #D0CA42

monochromatic

#1E5079 #2A70AA #428FD0 #73ACDC #A4C9E8

Accessibility & contrast

On white

3.46

#428FD0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.07

#428FD0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FD0

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FD0	#FFFFFF	#000000	##000000
##428FD0	1.00	3.46	6.07	6.07
#FFFFFF	3.46	1.00	21.00	21.00
#000000	6.07	21.00	1.00	1.00
##000000	6.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7291D3

Deuteranopia (green-blind)

#5E84CF

Tritanopia (blue-blind)

#009FA6

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428fd0;
/* rgb */ color: rgb(66, 143, 208);
/* oklch */ color: oklch(63.1% 0.124 246.9);

Tailwind

colors: {
  custom: {
    50: '#86afde',
    500: '#428fd0',
    950: '#000000',
  },
}

SCSS

$custom: #428fd0;
$custom-light: #86afde;
$custom-dark: #000000;

JSON

{
  "hex": "#428fd0",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 208
  },
  "hsl": {
    "h": 207.465,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.6309,
    "c": 0.12413,
    "h": 246.9
  },
  "luminance": 0.25357
}

Semantic roles & 50–950 ramp

primary

#428FD0

secondary

#D5B499

accent

#8D44E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428FD0

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

Preview Lab → · Contrast checker → · Palette generator →