#428FCD#428FCD

#428FCD is a light, vivid cyan. Relative luminance 0.252; OKLCH L 62.9% C 0.121 H 245.7°. Best body text is #000000 at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#428FCD
RGB	rgb(66, 143, 205)
HSL	hsl(207, 58%, 53%)
HSV	hsv(207, 68%, 80%)
CMYK	cmyk(67.8%, 30.2%, 0%, 19.6%)
CIE-LAB	lab(57.28, -3.89, -38.89)
CIE-LCH	lch(57.28, 39.08, 264.28°)
OKLab	oklab(62.93% -0.0496 -0.1099)
OKLCH	oklch(62.93% 0.121 245.7)
XYZ	xyz(23.0845, 25.2085, 61.3949)
Luminance	0.2521 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FCD #CD8042

analogous

#42CDC6 #428FCD #4249CD

triadic

#428FCD #CD428F #8FCD42

tetradic

#428FCD #C642CD #CD8042 #49CD42

square

#428FCD #C642CD #CD8042 #49CD42

split-complementary

#428FCD #CD4249 #CDC642

monochromatic

#1F4F76 #2C6FA6 #428FCD #72ACDA #A3C8E7

Accessibility & contrast

On white

3.48

#428FCD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.04

#428FCD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FCD

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FCD	#FFFFFF	#000000	##000000
##428FCD	1.00	3.48	6.04	6.04
#FFFFFF	3.48	1.00	21.00	21.00
#000000	6.04	21.00	1.00	1.00
##000000	6.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7391D0

Deuteranopia (green-blind)

#6084CC

Tritanopia (blue-blind)

#009EA5

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428fcd;
/* rgb */ color: rgb(66, 143, 205);
/* oklch */ color: oklch(62.9% 0.121 245.7);

Tailwind

colors: {
  custom: {
    50: '#85afdc',
    500: '#428fcd',
    950: '#000000',
  },
}

SCSS

$custom: #428fcd;
$custom-light: #85afdc;
$custom-dark: #000000;

JSON

{
  "hex": "#428fcd",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 205
  },
  "hsl": {
    "h": 206.763,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.62932,
    "c": 0.12059,
    "h": 245.7
  },
  "luminance": 0.25211
}

Semantic roles & 50–950 ramp

primary

#428FCD

secondary

#D3B297

accent

#8C46E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428FCD

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

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