#3F44B7#3F44B7

#3F44B7 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.6% C 0.178 H 274.9°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#3F44B7
RGB	rgb(63, 68, 183)
HSL	hsl(238, 49%, 48%)
HSV	hsv(238, 66%, 72%)
CMYK	cmyk(65.6%, 62.8%, 0%, 28.2%)
CIE-LAB	lab(35.22, 34.58, -61.53)
CIE-LCH	lch(35.22, 70.58, 299.34°)
OKLab	oklab(45.56% 0.0152 -0.1774)
OKLCH	oklch(45.56% 0.178 274.9)
XYZ	xyz(12.6614, 8.6088, 45.7850)
Luminance	0.0861 (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

#3F44B7 #B7B23F

analogous

#3F80B7 #3F44B7 #763FB7

triadic

#3F44B7 #B73F44 #44B73F

tetradic

#3F44B7 #B73F80 #B7B23F #3FB776

square

#3F44B7 #B73F80 #B7B23F #3FB776

split-complementary

#3F44B7 #B7763F #80B73F

monochromatic

#20225C #2F3389 #3F44B7 #686CCB #9699DB

Accessibility & contrast

On white

7.71

#3F44B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#3F44B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F44B7

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F44B7	#FFFFFF	#000000	##FFFFFF
##3F44B7	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058BB

Deuteranopia (green-blind)

#004EB5

Tritanopia (blue-blind)

#006177

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f44b7;
/* rgb */ color: rgb(63, 68, 183);
/* oklch */ color: oklch(45.6% 0.178 274.9);

Tailwind

colors: {
  custom: {
    50: '#8278ce',
    500: '#3f44b7',
    950: '#000000',
  },
}

SCSS

$custom: #3f44b7;
$custom-light: #8278ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f44b7",
  "rgb": {
    "r": 63,
    "g": 68,
    "b": 183
  },
  "hsl": {
    "h": 237.5,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.45557,
    "c": 0.17801,
    "h": 274.9
  },
  "luminance": 0.0861
}

Semantic roles & 50–950 ramp

primary

#3F44B7

secondary

#C6C48B

accent

#D34FD8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F44B7

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

Preview Lab → · Contrast checker → · Palette generator →