#4280FF#4280FF

#4280FF is a light, vivid blue. Relative luminance 0.238; OKLCH L 62.8% C 0.200 H 262.6°. Best body text is #000000 at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#4280FF
RGB	rgb(66, 128, 255)
HSL	hsl(220, 100%, 63%)
HSV	hsv(220, 74%, 100%)
CMYK	cmyk(74.1%, 49.8%, 0%, 0%)
CIE-LAB	lab(55.90, 22.81, -68.94)
CIE-LCH	lch(55.90, 72.62, 288.31°)
OKLab	oklab(62.76% -0.0259 -0.1983)
OKLCH	oklch(62.76% 0.2 262.6)
XYZ	xyz(28.0095, 23.8135, 97.7086)
Luminance	0.2382 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4280FF #FFC142

analogous

#42DFFF #4280FF #6242FF

triadic

#4280FF #FF4280 #80FF42

tetradic

#4280FF #FF42DF #FFC142 #42FF62

square

#4280FF #FF42DF #FFC142 #42FF62

split-complementary

#4280FF #FF6242 #DFFF42

monochromatic

#0041C7 #0557FF #4280FF #7FA9FF #BCD2FF

Accessibility & contrast

On white

3.64

#4280FF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.76

#4280FF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4280FF

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4280FF	#FFFFFF	#000000	##000000
##4280FF	1.00	3.64	5.76	5.76
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.76	21.00	1.00	1.00
##000000	5.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#318FFF

Deuteranopia (green-blind)

#007EFC

Tritanopia (blue-blind)

#009EB3

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #4280ff;
/* rgb */ color: rgb(66, 128, 255);
/* oklch */ color: oklch(62.8% 0.200 262.6);

Tailwind

colors: {
  custom: {
    50: '#8ea4ff',
    500: '#4280ff',
    950: '#000000',
  },
}

SCSS

$custom: #4280ff;
$custom-light: #8ea4ff;
$custom-dark: #000000;

JSON

{
  "hex": "#4280ff",
  "rgb": {
    "r": 66,
    "g": 128,
    "b": 255
  },
  "hsl": {
    "h": 220.317,
    "s": 100,
    "l": 62.941
  },
  "oklch": {
    "l": 0.62763,
    "c": 0.19998,
    "h": 262.6
  },
  "luminance": 0.23817
}

Semantic roles & 50–950 ramp

primary

#4280FF

secondary

#F0DAAC

accent

#9A00E6

background

#F9FAFF

surface

#F2F3FF

border

#CCCDD7

text

#0E0F18

muted

#7E7F86

Preview Lab

Preview with #4280FF

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

Preview Lab → · Contrast checker → · Palette generator →