#428DD1#428DD1

#428DD1 is a light, vivid cyan. Relative luminance 0.248; OKLCH L 62.7% C 0.127 H 248.6°. Best body text is #000000 at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#428DD1
RGB	rgb(66, 141, 209)
HSL	hsl(209, 61%, 54%)
HSV	hsv(209, 68%, 82%)
CMYK	cmyk(68.4%, 32.5%, 0%, 18%)
CIE-LAB	lab(56.89, -1.36, -41.75)
CIE-LCH	lch(56.89, 41.77, 268.14°)
OKLab	oklab(62.69% -0.0464 -0.1183)
OKLCH	oklch(62.69% 0.127 248.6)
XYZ	xyz(23.2760, 24.8090, 63.8712)
Luminance	0.2481 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DD1 #D18642

analogous

#42D1CD #428DD1 #4246D1

triadic

#428DD1 #D1428D #8DD142

tetradic

#428DD1 #CD42D1 #D18642 #46D142

square

#428DD1 #CD42D1 #D18642 #46D142

split-complementary

#428DD1 #D14246 #D1CD42

monochromatic

#1E4F7B #2A6EAC #428DD1 #73ABDD #A4C8E9

Accessibility & contrast

On white

3.52

#428DD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.96

#428DD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DD1

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DD1	#FFFFFF	#000000	##000000
##428DD1	1.00	3.52	5.96	5.96
#FFFFFF	3.52	1.00	21.00	21.00
#000000	5.96	21.00	1.00	1.00
##000000	5.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F90D4

Deuteranopia (green-blind)

#5B82D0

Tritanopia (blue-blind)

#009DA5

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428dd1;
/* rgb */ color: rgb(66, 141, 209);
/* oklch */ color: oklch(62.7% 0.127 248.6);

Tailwind

colors: {
  custom: {
    50: '#86aedf',
    500: '#428dd1',
    950: '#000000',
  },
}

SCSS

$custom: #428dd1;
$custom-light: #86aedf;
$custom-dark: #000000;

JSON

{
  "hex": "#428dd1",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 209
  },
  "hsl": {
    "h": 208.531,
    "s": 60.851,
    "l": 53.922
  },
  "oklch": {
    "l": 0.62688,
    "c": 0.12706,
    "h": 248.6
  },
  "luminance": 0.24811
}

Semantic roles & 50–950 ramp

primary

#428DD1

secondary

#D6B699

accent

#9044E4

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428DD1

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

Preview Lab → · Contrast checker → · Palette generator →