#428ADD#428ADD

#428ADD is a light, vivid cyan. Relative luminance 0.246; OKLCH L 62.7% C 0.145 H 253.8°. Best body text is #000000 at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#428ADD
RGB	rgb(66, 138, 221)
HSL	hsl(212, 70%, 56%)
HSV	hsv(212, 70%, 87%)
CMYK	cmyk(70.1%, 37.6%, 0%, 13.3%)
CIE-LAB	lab(56.64, 4.60, -48.88)
CIE-LCH	lch(56.64, 49.10, 275.38°)
OKLab	oklab(62.69% -0.0404 -0.1392)
OKLCH	oklch(62.69% 0.145 253.8)
XYZ	xyz(24.3816, 24.5530, 71.8468)
Luminance	0.2456 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ADD #DD9542

analogous

#42D8DD #428ADD #4842DD

triadic

#428ADD #DD428A #8ADD42

tetradic

#428ADD #DD42D8 #DD9542 #42DD48

square

#428ADD #DD42D8 #DD9542 #42DD48

split-complementary

#428ADD #DD4842 #D8DD42

monochromatic

#194E8C #226BBF #428ADD #76AAE6 #AACAF0

Accessibility & contrast

On white

3.55

#428ADD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.91

#428ADD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ADD

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ADD	#FFFFFF	#000000	##000000
##428ADD	1.00	3.55	5.91	5.91
#FFFFFF	3.55	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)

#6490E0

Deuteranopia (green-blind)

#4D81DB

Tritanopia (blue-blind)

#009DA9

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428add;
/* rgb */ color: rgb(66, 138, 221);
/* oklch */ color: oklch(62.7% 0.145 253.8);

Tailwind

colors: {
  custom: {
    50: '#88abe8',
    500: '#428add',
    950: '#000000',
  },
}

SCSS

$custom: #428add;
$custom-light: #88abe8;
$custom-dark: #000000;

JSON

{
  "hex": "#428add",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 221
  },
  "hsl": {
    "h": 212.129,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.62689,
    "c": 0.14492,
    "h": 253.8
  },
  "luminance": 0.24556
}

Semantic roles & 50–950 ramp

primary

#428ADD

secondary

#DDC09D

accent

#9A3BEC

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428ADD

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

Preview Lab → · Contrast checker → · Palette generator →