#428EC3#428EC3

#428EC3 is a light, moderate cyan. Relative luminance 0.244; OKLCH L 62.2% C 0.110 H 242.0°. Best body text is #000000 at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#428EC3
RGB	rgb(66, 142, 195)
HSL	hsl(205, 52%, 51%)
HSV	hsv(205, 66%, 76%)
CMYK	cmyk(66.2%, 27.2%, 0%, 23.5%)
CIE-LAB	lab(56.53, -6.72, -34.42)
CIE-LCH	lch(56.53, 35.07, 258.96°)
OKLab	oklab(62.19% -0.0517 -0.097)
OKLCH	oklch(62.19% 0.11 242)
XYZ	xyz(21.7663, 24.4421, 55.1899)
Luminance	0.2444 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EC3 #C37742

analogous

#42C3B7 #428EC3 #424DC3

triadic

#428EC3 #C3428E #8EC342

tetradic

#428EC3 #B742C3 #C37742 #4DC342

square

#428EC3 #B742C3 #C37742 #4DC342

split-complementary

#428EC3 #C3424D #C3B742

monochromatic

#214C69 #306D98 #428EC3 #70AAD2 #9FC6E0

Accessibility & contrast

On white

3.57

#428EC3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.89

#428EC3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EC3

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EC3	#FFFFFF	#000000	##000000
##428EC3	1.00	3.57	5.89	5.89
#FFFFFF	3.57	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)

#768FC5

Deuteranopia (green-blind)

#6482C2

Tritanopia (blue-blind)

#009BA0

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428ec3;
/* rgb */ color: rgb(66, 142, 195);
/* oklch */ color: oklch(62.2% 0.110 242.0);

Tailwind

colors: {
  custom: {
    50: '#84aed5',
    500: '#428ec3',
    950: '#000000',
  },
}

SCSS

$custom: #428ec3;
$custom-light: #84aed5;
$custom-dark: #000000;

JSON

{
  "hex": "#428ec3",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 195
  },
  "hsl": {
    "h": 204.651,
    "s": 51.807,
    "l": 51.176
  },
  "oklch": {
    "l": 0.62189,
    "c": 0.10986,
    "h": 242
  },
  "luminance": 0.24444
}

Semantic roles & 50–950 ramp

primary

#428EC3

secondary

#CDAB94

accent

#874DDB

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428EC3

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

Preview Lab → · Contrast checker → · Palette generator →