#428DFF#428DFF

#428DFF is a light, vivid blue. Relative luminance 0.274; OKLCH L 65.4% C 0.185 H 258.8°. Best body text is #000000 at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#428DFF
RGB	rgb(66, 141, 255)
HSL	hsl(216, 100%, 63%)
HSV	hsv(216, 74%, 100%)
CMYK	cmyk(74.1%, 44.7%, 0%, 0%)
CIE-LAB	lab(59.37, 14.88, -63.36)
CIE-LCH	lch(59.37, 65.09, 283.22°)
OKLab	oklab(65.42% -0.0361 -0.1816)
OKLCH	oklch(65.42% 0.185 258.8)
XYZ	xyz(29.8151, 27.4246, 98.3105)
Luminance	0.2743 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DFF #FFB442

analogous

#42ECFF #428DFF #5542FF

triadic

#428DFF #FF428D #8DFF42

tetradic

#428DFF #FF42EC #FFB442 #42FF55

square

#428DFF #FF42EC #FFB442 #42FF55

split-complementary

#428DFF #FF5542 #ECFF42

monochromatic

#004FC7 #0568FF #428DFF #7FB2FF #BCD7FF

Accessibility & contrast

On white

3.24

#428DFF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.49

#428DFF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DFF

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DFF	#FFFFFF	#000000	##000000
##428DFF	1.00	3.24	6.49	6.49
#FFFFFF	3.24	1.00	21.00	21.00
#000000	6.49	21.00	1.00	1.00
##000000	6.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5298FF

Deuteranopia (green-blind)

#2887FD

Tritanopia (blue-blind)

#00A8BA

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #428dff;
/* rgb */ color: rgb(66, 141, 255);
/* oklch */ color: oklch(65.4% 0.185 258.8);

Tailwind

colors: {
  custom: {
    50: '#8eadff',
    500: '#428dff',
    950: '#000000',
  },
}

SCSS

$custom: #428dff;
$custom-light: #8eadff;
$custom-dark: #000000;

JSON

{
  "hex": "#428dff",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 255
  },
  "hsl": {
    "h": 216.19,
    "s": 100,
    "l": 62.941
  },
  "oklch": {
    "l": 0.65421,
    "c": 0.1852,
    "h": 258.8
  },
  "luminance": 0.27428
}

Semantic roles & 50–950 ramp

primary

#428DFF

secondary

#F0D5AC

accent

#8A00E6

background

#F9FAFF

surface

#F2F4FF

border

#CCCED7

text

#0E1018

muted

#7E7F86

Preview Lab

Preview with #428DFF

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

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