#4280D9#4280D9

#4280D9 is a mid, vivid blue. Relative luminance 0.216; OKLCH L 60.3% C 0.150 H 257.7°. Best body text is #000000 at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#4280D9
RGB	rgb(66, 128, 217)
HSL	hsl(215, 67%, 55%)
HSV	hsv(215, 70%, 85%)
CMYK	cmyk(69.6%, 41%, 0%, 14.9%)
CIE-LAB	lab(53.60, 9.22, -51.46)
CIE-LCH	lch(53.60, 52.28, 280.16°)
OKLab	oklab(60.26% -0.032 -0.1469)
OKLCH	oklch(60.26% 0.15 257.7)
XYZ	xyz(22.4858, 21.6040, 68.6171)
Luminance	0.2161 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4280D9 #D99B42

analogous

#42CCD9 #4280D9 #4F42D9

triadic

#4280D9 #D94280 #80D942

tetradic

#4280D9 #D942CC #D99B42 #42D94F

square

#4280D9 #D942CC #D99B42 #42D94F

split-complementary

#4280D9 #D94F42 #CCD942

monochromatic

#1B4786 #2562B9 #4280D9 #75A2E3 #A8C4ED

Accessibility & contrast

On white

3.95

#4280D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.32

#4280D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4280D9

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4280D9	#FFFFFF	#000000	##000000
##4280D9	1.00	3.95	5.32	5.32
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.32	21.00	1.00	1.00
##000000	5.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5688DC

Deuteranopia (green-blind)

#3E7AD7

Tritanopia (blue-blind)

#0095A2

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #4280d9;
/* rgb */ color: rgb(66, 128, 217);
/* oklch */ color: oklch(60.3% 0.150 257.7);

Tailwind

colors: {
  custom: {
    50: '#87a4e5',
    500: '#4280d9',
    950: '#000000',
  },
}

SCSS

$custom: #4280d9;
$custom-light: #87a4e5;
$custom-dark: #000000;

JSON

{
  "hex": "#4280d9",
  "rgb": {
    "r": 66,
    "g": 128,
    "b": 217
  },
  "hsl": {
    "h": 215.364,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.60259,
    "c": 0.15034,
    "h": 257.7
  },
  "luminance": 0.21606
}

Semantic roles & 50–950 ramp

primary

#4280D9

secondary

#DBC19C

accent

#A33EE9

background

#F8FAFE

surface

#F0F3FC

border

#CBCDD5

text

#0D0F16

muted

#7D7F84

Preview Lab

Preview with #4280D9

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

Preview Lab → · Contrast checker → · Palette generator →