#3F36BB#3F36BB

#3F36BB is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.7% C 0.199 H 277.2°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#3F36BB
RGB	rgb(63, 54, 187)
HSL	hsl(244, 55%, 47%)
HSV	hsv(244, 71%, 73%)
CMYK	cmyk(66.3%, 71.1%, 0%, 26.7%)
CIE-LAB	lab(32.44, 44.36, -68.44)
CIE-LCH	lch(32.44, 81.56, 302.95°)
OKLab	oklab(43.65% 0.0251 -0.1976)
OKLCH	oklch(43.65% 0.199 277.2)
XYZ	xyz(12.3358, 7.2819, 47.7595)
Luminance	0.0728 (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

#3F36BB #B2BB36

analogous

#3670BB #3F36BB #8136BB

triadic

#3F36BB #BB3F36 #36BB3F

tetradic

#3F36BB #BB3670 #B2BB36 #36BB81

square

#3F36BB #BB3670 #B2BB36 #36BB81

split-complementary

#3F36BB #BB8136 #70BB36

monochromatic

#1F1B5C #2F288C #3F36BB #665ED0 #938DDE

Accessibility & contrast

On white

8.55

#3F36BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#3F36BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F36BB

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F36BB	#FFFFFF	#000000	##FFFFFF
##3F36BB	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005B75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f36bb;
/* rgb */ color: rgb(63, 54, 187);
/* oklch */ color: oklch(43.7% 0.199 277.2);

Tailwind

colors: {
  custom: {
    50: '#846fd1',
    500: '#3f36bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f36bb;
$custom-light: #846fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f36bb",
  "rgb": {
    "r": 63,
    "g": 54,
    "b": 187
  },
  "hsl": {
    "h": 244.06,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43652,
    "c": 0.19922,
    "h": 277.2
  },
  "luminance": 0.07283
}

Semantic roles & 50–950 ramp

primary

#3F36BB

secondary

#C4C984

accent

#DF49D4

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3F36BB

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

Preview Lab → · Contrast checker → · Palette generator →