#428ECC#428ECC

#428ECC is a light, vivid cyan. Relative luminance 0.249; OKLCH L 62.7% C 0.120 H 246.0°. Best body text is #000000 at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#428ECC
RGB	rgb(66, 142, 204)
HSL	hsl(207, 58%, 53%)
HSV	hsv(207, 68%, 80%)
CMYK	cmyk(67.6%, 30.4%, 0%, 20%)
CIE-LAB	lab(56.94, -3.66, -38.85)
CIE-LCH	lch(56.94, 39.03, 264.62°)
OKLab	oklab(62.65% -0.0489 -0.1098)
OKLCH	oklch(62.65% 0.12 246)
XYZ	xyz(22.8147, 24.8615, 60.7114)
Luminance	0.2486 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ECC #CC8042

analogous

#42CCC5 #428ECC #4249CC

triadic

#428ECC #CC428E #8ECC42

tetradic

#428ECC #C542CC #CC8042 #49CC42

square

#428ECC #C542CC #CC8042 #49CC42

split-complementary

#428ECC #CC4249 #CCC542

monochromatic

#1F4E74 #2C6EA4 #428ECC #72ABD9 #A2C8E6

Accessibility & contrast

On white

3.52

#428ECC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.97

#428ECC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ECC

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ECC	#FFFFFF	#000000	##000000
##428ECC	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)

#7290CF

Deuteranopia (green-blind)

#5F83CB

Tritanopia (blue-blind)

#009DA4

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428ecc;
/* rgb */ color: rgb(66, 142, 204);
/* oklch */ color: oklch(62.7% 0.120 246.0);

Tailwind

colors: {
  custom: {
    50: '#85aedc',
    500: '#428ecc',
    950: '#000000',
  },
}

SCSS

$custom: #428ecc;
$custom-light: #85aedc;
$custom-dark: #000000;

JSON

{
  "hex": "#428ecc",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 204
  },
  "hsl": {
    "h": 206.957,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.62651,
    "c": 0.12022,
    "h": 246
  },
  "luminance": 0.24864
}

Semantic roles & 50–950 ramp

primary

#428ECC

secondary

#D3B297

accent

#8C47E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428ECC

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

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