#3F3DBB#3F3DBB

#3F3DBB is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.7% C 0.192 H 276.1°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#3F3DBB
RGB	rgb(63, 61, 187)
HSL	hsl(241, 51%, 49%)
HSV	hsv(241, 67%, 73%)
CMYK	cmyk(66.3%, 67.4%, 0%, 26.7%)
CIE-LAB	lab(33.94, 40.25, -65.97)
CIE-LCH	lch(33.94, 77.28, 301.38°)
OKLab	oklab(44.73% 0.0202 -0.1904)
OKLCH	oklch(44.73% 0.192 276.1)
XYZ	xyz(12.6853, 7.9810, 47.8761)
Luminance	0.0798 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.56

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F3DBB #B9BB3D

analogous

#3D7ABB #3F3DBB #7E3DBB

triadic

#3F3DBB #BB3F3D #3DBB3F

tetradic

#3F3DBB #BB3D7A #B9BB3D #3DBB7E

square

#3F3DBB #BB3D7A #B9BB3D #3DBB7E

split-complementary

#3F3DBB #BB7E3D #7ABB3D

monochromatic

#201F5F #2F2E8D #3F3DBB #6968CE #9796DD

Accessibility & contrast

On white

8.09

#3F3DBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3F3DBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3DBB

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3DBB	#FFFFFF	#000000	##FFFFFF
##3F3DBB	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#005E77

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f3dbb;
/* rgb */ color: rgb(63, 61, 187);
/* oklch */ color: oklch(44.7% 0.192 276.1);

Tailwind

colors: {
  custom: {
    50: '#8473d1',
    500: '#3f3dbb',
    950: '#000000',
  },
}

SCSS

$custom: #3f3dbb;
$custom-light: #8473d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3dbb",
  "rgb": {
    "r": 63,
    "g": 61,
    "b": 187
  },
  "hsl": {
    "h": 240.952,
    "s": 50.806,
    "l": 48.627
  },
  "oklch": {
    "l": 0.44733,
    "c": 0.1915,
    "h": 276.1
  },
  "luminance": 0.07982
}

Semantic roles & 50–950 ramp

primary

#3F3DBB

secondary

#C7C88C

accent

#DA4ED8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3F3DBB

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

Preview Lab → · Contrast checker → · Palette generator →