#428DD5#428DD5

#428DD5 is a light, vivid cyan. Relative luminance 0.250; OKLCH L 62.9% C 0.132 H 249.9°. Best body text is #000000 at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#428DD5
RGB	rgb(66, 141, 213)
HSL	hsl(209, 64%, 55%)
HSV	hsv(209, 69%, 84%)
CMYK	cmyk(69%, 33.8%, 0%, 16.5%)
CIE-LAB	lab(57.08, 0.03, -43.69)
CIE-LCH	lch(57.08, 43.69, 270.04°)
OKLab	oklab(62.91% -0.0453 -0.1239)
OKLCH	oklch(62.91% 0.132 249.9)
XYZ	xyz(23.7774, 25.0096, 66.5121)
Luminance	0.2501 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DD5 #D58A42

analogous

#42D5D4 #428DD5 #4244D5

triadic

#428DD5 #D5428D #8DD542

tetradic

#428DD5 #D442D5 #D58A42 #44D542

square

#428DD5 #D442D5 #D58A42 #44D542

split-complementary

#428DD5 #D54244 #D5D442

monochromatic

#1C4F80 #286EB2 #428DD5 #74ABE0 #A6C9EB

Accessibility & contrast

On white

3.50

#428DD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.00

#428DD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DD5

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DD5	#FFFFFF	#000000	##000000
##428DD5	1.00	3.50	6.00	6.00
#FFFFFF	3.50	1.00	21.00	21.00
#000000	6.00	21.00	1.00	1.00
##000000	6.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D91D8

Deuteranopia (green-blind)

#5883D4

Tritanopia (blue-blind)

#009EA7

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428dd5;
/* rgb */ color: rgb(66, 141, 213);
/* oklch */ color: oklch(62.9% 0.132 249.9);

Tailwind

colors: {
  custom: {
    50: '#86aee2',
    500: '#428dd5',
    950: '#000000',
  },
}

SCSS

$custom: #428dd5;
$custom-light: #86aee2;
$custom-dark: #000000;

JSON

{
  "hex": "#428dd5",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 213
  },
  "hsl": {
    "h": 209.388,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.62906,
    "c": 0.13196,
    "h": 249.9
  },
  "luminance": 0.25012
}

Semantic roles & 50–950 ramp

primary

#428DD5

secondary

#D8B99A

accent

#9241E7

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428DD5

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

Preview Lab → · Contrast checker → · Palette generator →