#428EC5#428EC5

#428EC5 is a light, moderate cyan. Relative luminance 0.245; OKLCH L 62.3% C 0.112 H 242.9°. Best body text is #000000 at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#428EC5
RGB	rgb(66, 142, 197)
HSL	hsl(205, 53%, 52%)
HSV	hsv(205, 66%, 77%)
CMYK	cmyk(66.5%, 27.9%, 0%, 22.7%)
CIE-LAB	lab(56.62, -6.04, -35.41)
CIE-LCH	lch(56.62, 35.92, 260.32°)
OKLab	oklab(62.29% -0.051 -0.0998)
OKLCH	oklch(62.29% 0.112 242.9)
XYZ	xyz(21.9940, 24.5332, 56.3888)
Luminance	0.2454 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EC5 #C57942

analogous

#42C5BB #428EC5 #424DC5

triadic

#428EC5 #C5428E #8EC542

tetradic

#428EC5 #BB42C5 #C57942 #4DC542

square

#428EC5 #BB42C5 #C57942 #4DC542

split-complementary

#428EC5 #C5424D #C5BB42

monochromatic

#214C6C #2F6D9A #428EC5 #71AAD3 #A0C6E2

Accessibility & contrast

On white

3.56

#428EC5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.91

#428EC5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EC5

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EC5	#FFFFFF	#000000	##000000
##428EC5	1.00	3.56	5.91	5.91
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.91	21.00	1.00	1.00
##000000	5.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#758FC7

Deuteranopia (green-blind)

#6382C4

Tritanopia (blue-blind)

#009BA1

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428ec5;
/* rgb */ color: rgb(66, 142, 197);
/* oklch */ color: oklch(62.3% 0.112 242.9);

Tailwind

colors: {
  custom: {
    50: '#84aed7',
    500: '#428ec5',
    950: '#000000',
  },
}

SCSS

$custom: #428ec5;
$custom-light: #84aed7;
$custom-dark: #000000;

JSON

{
  "hex": "#428ec5",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 197
  },
  "hsl": {
    "h": 205.191,
    "s": 53.036,
    "l": 51.569
  },
  "oklch": {
    "l": 0.6229,
    "c": 0.11211,
    "h": 242.9
  },
  "luminance": 0.24535
}

Semantic roles & 50–950 ramp

primary

#428EC5

secondary

#CEAD95

accent

#884BDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428EC5

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

Preview Lab → · Contrast checker → · Palette generator →