#428EC1#428EC1

#428EC1 is a light, moderate cyan. Relative luminance 0.244; OKLCH L 62.1% C 0.108 H 240.9°. Best body text is #000000 at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#428EC1
RGB	rgb(66, 142, 193)
HSL	hsl(204, 51%, 51%)
HSV	hsv(204, 66%, 76%)
CMYK	cmyk(65.8%, 26.4%, 0%, 24.3%)
CIE-LAB	lab(56.44, -7.39, -33.42)
CIE-LCH	lch(56.44, 34.23, 257.54°)
OKLab	oklab(62.09% -0.0523 -0.0941)
OKLCH	oklch(62.09% 0.108 240.9)
XYZ	xyz(21.5417, 24.3523, 54.0069)
Luminance	0.2435 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EC1 #C17542

analogous

#42C1B4 #428EC1 #424EC1

triadic

#428EC1 #C1428E #8EC142

tetradic

#428EC1 #B442C1 #C17542 #4EC142

square

#428EC1 #B442C1 #C17542 #4EC142

split-complementary

#428EC1 #C1424E #C1B442

monochromatic

#224B67 #316D95 #428EC1 #70AAD0 #9EC5DF

Accessibility & contrast

On white

3.58

#428EC1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.87

#428EC1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EC1

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EC1	#FFFFFF	#000000	##000000
##428EC1	1.00	3.58	5.87	5.87
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.87	21.00	1.00	1.00
##000000	5.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778EC3

Deuteranopia (green-blind)

#6582C0

Tritanopia (blue-blind)

#009BA0

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428ec1;
/* rgb */ color: rgb(66, 142, 193);
/* oklch */ color: oklch(62.1% 0.108 240.9);

Tailwind

colors: {
  custom: {
    50: '#83aed4',
    500: '#428ec1',
    950: '#000000',
  },
}

SCSS

$custom: #428ec1;
$custom-light: #83aed4;
$custom-dark: #000000;

JSON

{
  "hex": "#428ec1",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 193
  },
  "hsl": {
    "h": 204.094,
    "s": 50.598,
    "l": 50.784
  },
  "oklch": {
    "l": 0.62089,
    "c": 0.10764,
    "h": 240.9
  },
  "luminance": 0.24355
}

Semantic roles & 50–950 ramp

primary

#428EC1

secondary

#CCAA93

accent

#864EDA

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428EC1

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

Preview Lab → · Contrast checker → · Palette generator →