#3F3CB9#3F3CB9

#3F3CB9 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.4% C 0.190 H 276.4°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#3F3CB9
RGB	rgb(63, 60, 185)
HSL	hsl(241, 51%, 48%)
HSV	hsv(241, 68%, 73%)
CMYK	cmyk(65.9%, 67.6%, 0%, 27.5%)
CIE-LAB	lab(33.54, 40.18, -65.45)
CIE-LCH	lch(33.54, 76.80, 301.55°)
OKLab	oklab(44.39% 0.0212 -0.1889)
OKLCH	oklch(44.39% 0.19 276.4)
XYZ	xyz(12.4199, 7.7902, 46.7387)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.62

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F3CB9 #B6B93C

analogous

#3C77B9 #3F3CB9 #7D3CB9

triadic

#3F3CB9 #B93F3C #3CB93F

tetradic

#3F3CB9 #B93C77 #B6B93C #3CB97D

square

#3F3CB9 #B93C77 #B6B93C #3CB97D

split-complementary

#3F3CB9 #B97D3C #77B93C

monochromatic

#201E5D #2F2D8B #3F3CB9 #6865CD #9593DC

Accessibility & contrast

On white

8.21

#3F3CB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3F3CB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3CB9

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3CB9	#FFFFFF	#000000	##FFFFFF
##3F3CB9	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BD

Deuteranopia (green-blind)

#0049B7

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f3cb9;
/* rgb */ color: rgb(63, 60, 185);
/* oklch */ color: oklch(44.4% 0.190 276.4);

Tailwind

colors: {
  custom: {
    50: '#8372cf',
    500: '#3f3cb9',
    950: '#000000',
  },
}

SCSS

$custom: #3f3cb9;
$custom-light: #8372cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3cb9",
  "rgb": {
    "r": 63,
    "g": 60,
    "b": 185
  },
  "hsl": {
    "h": 241.44,
    "s": 51.02,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44388,
    "c": 0.19008,
    "h": 276.4
  },
  "luminance": 0.07791
}

Semantic roles & 50–950 ramp

primary

#3F3CB9

secondary

#C6C789

accent

#DA4DD7

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3F3CB9

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

Preview Lab → · Contrast checker → · Palette generator →