#428CD0#428CD0

#428CD0 is a light, vivid cyan. Relative luminance 0.245; OKLCH L 62.4% C 0.127 H 248.9°. Best body text is #000000 at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#428CD0
RGB	rgb(66, 140, 208)
HSL	hsl(209, 60%, 54%)
HSV	hsv(209, 68%, 82%)
CMYK	cmyk(68.3%, 32.7%, 0%, 18.4%)
CIE-LAB	lab(56.55, -1.12, -41.72)
CIE-LCH	lch(56.55, 41.73, 268.47°)
OKLab	oklab(62.41% -0.0457 -0.1182)
OKLCH	oklch(62.41% 0.127 248.9)
XYZ	xyz(23.0058, 24.4661, 63.1723)
Luminance	0.2447 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CD0 #D08642

analogous

#42D0CD #428CD0 #4245D0

triadic

#428CD0 #D0428C #8CD042

tetradic

#428CD0 #CD42D0 #D08642 #45D042

square

#428CD0 #CD42D0 #D08642 #45D042

split-complementary

#428CD0 #D04245 #D0CD42

monochromatic

#1E4E79 #2A6DAA #428CD0 #73AADC #A4C8E8

Accessibility & contrast

On white

3.56

#428CD0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.89

#428CD0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CD0

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CD0	#FFFFFF	#000000	##000000
##428CD0	1.00	3.56	5.89	5.89
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.89	21.00	1.00	1.00
##000000	5.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E8FD3

Deuteranopia (green-blind)

#5A82CF

Tritanopia (blue-blind)

#009CA4

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428cd0;
/* rgb */ color: rgb(66, 140, 208);
/* oklch */ color: oklch(62.4% 0.127 248.9);

Tailwind

colors: {
  custom: {
    50: '#86adde',
    500: '#428cd0',
    950: '#000000',
  },
}

SCSS

$custom: #428cd0;
$custom-light: #86adde;
$custom-dark: #000000;

JSON

{
  "hex": "#428cd0",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 208
  },
  "hsl": {
    "h": 208.732,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.62407,
    "c": 0.12674,
    "h": 248.9
  },
  "luminance": 0.24468
}

Semantic roles & 50–950 ramp

primary

#428CD0

secondary

#D5B699

accent

#9144E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428CD0

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

Preview Lab → · Contrast checker → · Palette generator →