#3F40DE#3F40DE

#3F40DE is a mid, highly saturated blue. Relative luminance 0.100; OKLCH L 48.5% C 0.232 H 273.3°. Best body text is #FFFFFF at 7.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F40DE
RGB	rgb(63, 64, 222)
HSL	hsl(240, 71%, 56%)
HSV	hsv(240, 72%, 87%)
CMYK	cmyk(71.6%, 71.2%, 0%, 12.9%)
CIE-LAB	lab(37.83, 50.02, -79.90)
CIE-LCH	lch(37.83, 94.26, 302.05°)
OKLab	oklab(48.52% 0.0135 -0.2311)
OKLCH	oklch(48.52% 0.232 273.3)
XYZ	xyz(17.0637, 9.9958, 70.1232)
Luminance	0.1000 (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

#3F40DE #DEDD3F

analogous

#3F8FDE #3F40DE #8E3FDE

triadic

#3F40DE #DE3F40 #40DE3F

tetradic

#3F40DE #DE3F8F #DEDD3F #3FDE8E

square

#3F40DE #DE3F8F #DEDD3F #3FDE8E

split-complementary

#3F40DE #DE8E3F #8FDE3F

monochromatic

#18198B #2122BF #3F40DE #7374E7 #A7A8F0

Accessibility & contrast

On white

7.00

#3F40DE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

3.00

#3F40DE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F40DE

7.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F40DE	#FFFFFF	#000000	##FFFFFF
##3F40DE	1.00	7.00	3.00	7.00
#FFFFFF	7.00	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	7.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061E3

Deuteranopia (green-blind)

#0051DB

Tritanopia (blue-blind)

#006D8B

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f40de;
/* rgb */ color: rgb(63, 64, 222);
/* oklch */ color: oklch(48.5% 0.232 273.3);

Tailwind

colors: {
  custom: {
    50: '#8b76ea',
    500: '#3f40de',
    950: '#000000',
  },
}

SCSS

$custom: #3f40de;
$custom-light: #8b76ea;
$custom-dark: #000000;

JSON

{
  "hex": "#3f40de",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 222
  },
  "hsl": {
    "h": 239.623,
    "s": 70.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.48517,
    "c": 0.23151,
    "h": 273.3
  },
  "luminance": 0.09997
}

Semantic roles & 50–950 ramp

primary

#3F40DE

secondary

#DDDD9B

accent

#EC3AED

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #3F40DE

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

Preview Lab → · Contrast checker → · Palette generator →