#428BCE#428BCE

#428BCE is a light, vivid cyan. Relative luminance 0.241; OKLCH L 62.1% C 0.125 H 248.8°. Best body text is #000000 at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#428BCE
RGB	rgb(66, 139, 206)
HSL	hsl(209, 59%, 53%)
HSV	hsv(209, 68%, 81%)
CMYK	cmyk(68%, 32.5%, 0%, 19.2%)
CIE-LAB	lab(56.17, -1.22, -41.20)
CIE-LCH	lch(56.17, 41.22, 268.30°)
OKLab	oklab(62.07% -0.0453 -0.1167)
OKLCH	oklch(62.07% 0.125 248.8)
XYZ	xyz(22.6158, 24.0773, 61.8361)
Luminance	0.2408 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BCE #CE8542

analogous

#42CECB #428BCE #4245CE

triadic

#428BCE #CE428B #8BCE42

tetradic

#428BCE #CB42CE #CE8542 #45CE42

square

#428BCE #CB42CE #CE8542 #45CE42

split-complementary

#428BCE #CE4245 #CECB42

monochromatic

#1F4D77 #2B6CA7 #428BCE #73A9DB #A3C7E7

Accessibility & contrast

On white

3.61

#428BCE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.82

#428BCE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BCE

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BCE	#FFFFFF	#000000	##000000
##428BCE	1.00	3.61	5.82	5.82
#FFFFFF	3.61	1.00	21.00	21.00
#000000	5.82	21.00	1.00	1.00
##000000	5.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D8ED1

Deuteranopia (green-blind)

#5A81CD

Tritanopia (blue-blind)

#009BA3

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428bce;
/* rgb */ color: rgb(66, 139, 206);
/* oklch */ color: oklch(62.1% 0.125 248.8);

Tailwind

colors: {
  custom: {
    50: '#85acdd',
    500: '#428bce',
    950: '#000000',
  },
}

SCSS

$custom: #428bce;
$custom-light: #85acdd;
$custom-dark: #000000;

JSON

{
  "hex": "#428bce",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 206
  },
  "hsl": {
    "h": 208.714,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.62072,
    "c": 0.12519,
    "h": 248.8
  },
  "luminance": 0.2408
}

Semantic roles & 50–950 ramp

primary

#428BCE

secondary

#D4B598

accent

#9146E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428BCE

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

Preview Lab → · Contrast checker → · Palette generator →