#3F38BB#3F38BB

#3F38BB is a dark, vivid blue. Relative luminance 0.075; OKLCH L 44.0% C 0.197 H 276.9°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#3F38BB
RGB	rgb(63, 56, 187)
HSL	hsl(243, 54%, 48%)
HSV	hsv(243, 70%, 73%)
CMYK	cmyk(66.3%, 70.1%, 0%, 26.7%)
CIE-LAB	lab(32.86, 43.20, -67.76)
CIE-LCH	lch(32.86, 80.36, 302.52°)
OKLab	oklab(43.95% 0.0237 -0.1956)
OKLCH	oklch(43.95% 0.197 276.9)
XYZ	xyz(12.4308, 7.4719, 47.7912)
Luminance	0.0747 (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

#3F38BB #B4BB38

analogous

#3873BB #3F38BB #8038BB

triadic

#3F38BB #BB3F38 #38BB3F

tetradic

#3F38BB #BB3873 #B4BB38 #38BB80

square

#3F38BB #BB3873 #B4BB38 #38BB80

split-complementary

#3F38BB #BB8038 #73BB38

monochromatic

#1F1C5D #2F2A8C #3F38BB #6761D0 #9490DE

Accessibility & contrast

On white

8.42

#3F38BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#3F38BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F38BB

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F38BB	#FFFFFF	#000000	##FFFFFF
##3F38BB	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BF

Deuteranopia (green-blind)

#0048B9

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f38bb;
/* rgb */ color: rgb(63, 56, 187);
/* oklch */ color: oklch(44.0% 0.197 276.9);

Tailwind

colors: {
  custom: {
    50: '#8470d1',
    500: '#3f38bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f38bb;
$custom-light: #8470d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f38bb",
  "rgb": {
    "r": 63,
    "g": 56,
    "b": 187
  },
  "hsl": {
    "h": 243.206,
    "s": 53.909,
    "l": 47.647
  },
  "oklch": {
    "l": 0.43951,
    "c": 0.19707,
    "h": 276.9
  },
  "luminance": 0.07473
}

Semantic roles & 50–950 ramp

primary

#3F38BB

secondary

#C5C886

accent

#DD4BD5

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3F38BB

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

Preview Lab → · Contrast checker → · Palette generator →