#428ADF#428ADF

#428ADF is a light, vivid cyan. Relative luminance 0.247; OKLCH L 62.8% C 0.147 H 254.3°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#428ADF
RGB	rgb(66, 138, 223)
HSL	hsl(212, 71%, 57%)
HSV	hsv(212, 70%, 87%)
CMYK	cmyk(70.4%, 38.1%, 0%, 12.5%)
CIE-LAB	lab(56.74, 5.31, -49.83)
CIE-LCH	lch(56.74, 50.11, 276.08°)
OKLab	oklab(62.81% -0.0399 -0.1419)
OKLCH	oklch(62.81% 0.147 254.3)
XYZ	xyz(24.6496, 24.6603, 73.2585)
Luminance	0.2466 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ADF #DF9742

analogous

#42D9DF #428ADF #4942DF

triadic

#428ADF #DF428A #8ADF42

tetradic

#428ADF #DF42D9 #DF9742 #42DF49

square

#428ADF #DF42D9 #DF9742 #42DF49

split-complementary

#428ADF #DF4942 #D9DF42

monochromatic

#184E8E #216BC3 #428ADF #76AAE8 #ABCBF1

Accessibility & contrast

On white

3.54

#428ADF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.93

#428ADF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ADF

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ADF	#FFFFFF	#000000	##000000
##428ADF	1.00	3.54	5.93	5.93
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.93	21.00	1.00	1.00
##000000	5.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6390E2

Deuteranopia (green-blind)

#4B81DD

Tritanopia (blue-blind)

#009EAA

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428adf;
/* rgb */ color: rgb(66, 138, 223);
/* oklch */ color: oklch(62.8% 0.147 254.3);

Tailwind

colors: {
  custom: {
    50: '#88abe9',
    500: '#428adf',
    950: '#000000',
  },
}

SCSS

$custom: #428adf;
$custom-light: #88abe9;
$custom-dark: #000000;

JSON

{
  "hex": "#428adf",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 223
  },
  "hsl": {
    "h": 212.484,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.62806,
    "c": 0.14746,
    "h": 254.3
  },
  "luminance": 0.24663
}

Semantic roles & 50–950 ramp

primary

#428ADF

secondary

#DFC19E

accent

#9B3AEE

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428ADF

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

Preview Lab → · Contrast checker → · Palette generator →