#3F3FBB#3F3FBB

#3F3FBB is a mid, vivid blue. Relative luminance 0.082; OKLCH L 45.1% C 0.189 H 275.7°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FBB
RGB	rgb(63, 63, 187)
HSL	hsl(240, 50%, 49%)
HSV	hsv(240, 66%, 73%)
CMYK	cmyk(66.3%, 66.3%, 0%, 26.7%)
CIE-LAB	lab(34.39, 39.04, -65.24)
CIE-LCH	lch(34.39, 76.03, 300.90°)
OKLab	oklab(45.06% 0.0187 -0.1883)
OKLCH	oklch(45.06% 0.189 275.7)
XYZ	xyz(12.7941, 8.1985, 47.9123)
Luminance	0.0820 (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

#3F3FBB #BBBB3F

analogous

#3F7DBB #3F3FBB #7D3FBB

triadic

#3F3FBB #BB3F3F #3FBB3F

tetradic

#3F3FBB #BB3F7D #BBBB3F #3FBB7D

square

#3F3FBB #BB3F7D #BBBB3F #3FBB7D

split-complementary

#3F3FBB #BB7D3F #7DBB3F

monochromatic

#20205F #30308D #3F3FBB #6A6ACD #9898DC

Accessibility & contrast

On white

7.95

#3F3FBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3F3FBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FBB

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FBB	#FFFFFF	#000000	##FFFFFF
##3F3FBB	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BF

Deuteranopia (green-blind)

#004BB9

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f3fbb;
/* rgb */ color: rgb(63, 63, 187);
/* oklch */ color: oklch(45.1% 0.189 275.7);

Tailwind

colors: {
  custom: {
    50: '#8375d0',
    500: '#3f3fbb',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fbb;
$custom-light: #8375d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fbb",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 187
  },
  "hsl": {
    "h": 240,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.45059,
    "c": 0.1892,
    "h": 275.7
  },
  "luminance": 0.082
}

Semantic roles & 50–950 ramp

primary

#3F3FBB

secondary

#C8C88E

accent

#D94FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3F3FBB

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

Preview Lab → · Contrast checker → · Palette generator →