#4240D9#4240D9

#4240D9 is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 48.2% C 0.225 H 274.5°. Best body text is #FFFFFF at 7.08:1 contrast (WCAG AA passes).

Color values

HEX	#4240D9
RGB	rgb(66, 64, 217)
HSL	hsl(241, 67%, 55%)
HSV	hsv(241, 71%, 85%)
CMYK	cmyk(69.6%, 70.5%, 0%, 14.9%)
CIE-LAB	lab(37.54, 48.71, -77.51)
CIE-LCH	lch(37.54, 91.54, 302.15°)
OKLab	oklab(48.21% 0.0177 -0.2241)
OKLCH	oklch(48.21% 0.225 274.5)
XYZ	xyz(16.6004, 9.8332, 66.6553)
Luminance	0.0984 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4240D9 #D7D940

analogous

#408BD9 #4240D9 #8E40D9

triadic

#4240D9 #D94240 #40D942

tetradic

#4240D9 #D9408B #D7D940 #40D98E

square

#4240D9 #D9408B #D7D940 #40D98E

split-complementary

#4240D9 #D98E40 #8BD940

monochromatic

#1C1A84 #2624B7 #4240D9 #7573E3 #A7A6ED

Accessibility & contrast

On white

7.08

#4240D9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#4240D9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240D9

7.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240D9	#FFFFFF	#000000	##FFFFFF
##4240D9	1.00	7.08	2.97	7.08
#FFFFFF	7.08	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FDE

Deuteranopia (green-blind)

#0051D6

Tritanopia (blue-blind)

#006B88

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #4240d9;
/* rgb */ color: rgb(66, 64, 217);
/* oklch */ color: oklch(48.2% 0.225 274.5);

Tailwind

colors: {
  custom: {
    50: '#8b76e6',
    500: '#4240d9',
    950: '#000000',
  },
}

SCSS

$custom: #4240d9;
$custom-light: #8b76e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4240d9",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 217
  },
  "hsl": {
    "h": 240.784,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.48212,
    "c": 0.22476,
    "h": 274.5
  },
  "luminance": 0.09835
}

Semantic roles & 50–950 ramp

primary

#4240D9

secondary

#DADA9A

accent

#EA3EE7

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #4240D9

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

Preview Lab → · Contrast checker → · Palette generator →