#428FC1#428FC1

#428FC1 is a light, moderate cyan. Relative luminance 0.247; OKLCH L 62.3% C 0.107 H 240.1°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#428FC1
RGB	rgb(66, 143, 193)
HSL	hsl(204, 51%, 51%)
HSV	hsv(204, 66%, 76%)
CMYK	cmyk(65.8%, 25.9%, 0%, 24.3%)
CIE-LAB	lab(56.73, -7.96, -32.96)
CIE-LCH	lch(56.73, 33.91, 256.43°)
OKLab	oklab(62.32% -0.0533 -0.0927)
OKLCH	oklch(62.32% 0.107 240.1)
XYZ	xyz(21.6912, 24.6512, 54.0567)
Luminance	0.2465 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FC1 #C17442

analogous

#42C1B3 #428FC1 #424FC1

triadic

#428FC1 #C1428F #8FC142

tetradic

#428FC1 #B342C1 #C17442 #4FC142

square

#428FC1 #B342C1 #C17442 #4FC142

split-complementary

#428FC1 #C1424F #C1B342

monochromatic

#224C67 #316E95 #428FC1 #70AAD0 #9EC6DF

Accessibility & contrast

On white

3.54

#428FC1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.93

#428FC1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FC1

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FC1	#FFFFFF	#000000	##000000
##428FC1	1.00	3.54	5.93	5.93
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.93	21.00	1.00	1.00
##000000	5.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788FC3

Deuteranopia (green-blind)

#6783C0

Tritanopia (blue-blind)

#009CA0

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428fc1;
/* rgb */ color: rgb(66, 143, 193);
/* oklch */ color: oklch(62.3% 0.107 240.1);

Tailwind

colors: {
  custom: {
    50: '#83afd4',
    500: '#428fc1',
    950: '#000000',
  },
}

SCSS

$custom: #428fc1;
$custom-light: #83afd4;
$custom-dark: #000000;

JSON

{
  "hex": "#428fc1",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 193
  },
  "hsl": {
    "h": 203.622,
    "s": 50.598,
    "l": 50.784
  },
  "oklch": {
    "l": 0.62323,
    "c": 0.10699,
    "h": 240.1
  },
  "luminance": 0.24653
}

Semantic roles & 50–950 ramp

primary

#428FC1

secondary

#CCA993

accent

#854EDA

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428FC1

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

Preview Lab → · Contrast checker → · Palette generator →