#428FC5#428FC5

#428FC5 is a light, moderate cyan. Relative luminance 0.248; OKLCH L 62.5% C 0.111 H 242.1°. Best body text is #000000 at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#428FC5
RGB	rgb(66, 143, 197)
HSL	hsl(205, 53%, 52%)
HSV	hsv(205, 66%, 77%)
CMYK	cmyk(66.5%, 27.4%, 0%, 22.7%)
CIE-LAB	lab(56.91, -6.61, -34.95)
CIE-LCH	lch(56.91, 35.57, 259.29°)
OKLab	oklab(62.52% -0.052 -0.0985)
OKLCH	oklch(62.52% 0.111 242.1)
XYZ	xyz(22.1434, 24.8321, 56.4386)
Luminance	0.2483 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FC5 #C57842

analogous

#42C5BA #428FC5 #424EC5

triadic

#428FC5 #C5428F #8FC542

tetradic

#428FC5 #BA42C5 #C57842 #4EC542

square

#428FC5 #BA42C5 #C57842 #4EC542

split-complementary

#428FC5 #C5424E #C5BA42

monochromatic

#214D6C #2F6E9A #428FC5 #71ABD3 #A0C7E2

Accessibility & contrast

On white

3.52

#428FC5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.97

#428FC5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FC5

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FC5	#FFFFFF	#000000	##000000
##428FC5	1.00	3.52	5.97	5.97
#FFFFFF	3.52	1.00	21.00	21.00
#000000	5.97	21.00	1.00	1.00
##000000	5.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7790C7

Deuteranopia (green-blind)

#6583C4

Tritanopia (blue-blind)

#009CA2

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428fc5;
/* rgb */ color: rgb(66, 143, 197);
/* oklch */ color: oklch(62.5% 0.111 242.1);

Tailwind

colors: {
  custom: {
    50: '#84afd7',
    500: '#428fc5',
    950: '#000000',
  },
}

SCSS

$custom: #428fc5;
$custom-light: #84afd7;
$custom-dark: #000000;

JSON

{
  "hex": "#428fc5",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 197
  },
  "hsl": {
    "h": 204.733,
    "s": 53.036,
    "l": 51.569
  },
  "oklch": {
    "l": 0.62522,
    "c": 0.1114,
    "h": 242.1
  },
  "luminance": 0.24834
}

Semantic roles & 50–950 ramp

primary

#428FC5

secondary

#CEAC95

accent

#874BDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428FC5

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

Preview Lab → · Contrast checker → · Palette generator →