#3F33AB#3F33AB

#3F33AB is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.7% C 0.182 H 279.4°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#3F33AB
RGB	rgb(63, 51, 171)
HSL	hsl(246, 54%, 44%)
HSV	hsv(246, 70%, 67%)
CMYK	cmyk(63.2%, 70.2%, 0%, 32.9%)
CIE-LAB	lab(30.31, 40.91, -62.42)
CIE-LCH	lch(30.31, 74.63, 303.24°)
OKLab	oklab(41.67% 0.0299 -0.18)
OKLCH	oklch(41.67% 0.182 279.4)
XYZ	xyz(10.5821, 6.3639, 39.1909)
Luminance	0.0636 (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

#3F33AB #9FAB33

analogous

#3363AB #3F33AB #7B33AB

triadic

#3F33AB #AB3F33 #33AB3F

tetradic

#3F33AB #AB3363 #9FAB33 #33AB7B

square

#3F33AB #AB3363 #9FAB33 #33AB7B

split-complementary

#3F33AB #AB7B33 #63AB33

monochromatic

#1C174D #2E257C #3F33AB #5D50CB #887FD9

Accessibility & contrast

On white

9.24

#3F33AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#3F33AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33AB

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33AB	#FFFFFF	#000000	##FFFFFF
##3F33AB	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00536B

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3f33ab;
/* rgb */ color: rgb(63, 51, 171);
/* oklch */ color: oklch(41.7% 0.182 279.4);

Tailwind

colors: {
  custom: {
    50: '#816cc5',
    500: '#3f33ab',
    950: '#000000',
  },
}

SCSS

$custom: #3f33ab;
$custom-light: #816cc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33ab",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 171
  },
  "hsl": {
    "h": 246,
    "s": 54.054,
    "l": 43.529
  },
  "oklch": {
    "l": 0.41673,
    "c": 0.18248,
    "h": 279.4
  },
  "luminance": 0.06365
}

Semantic roles & 50–950 ramp

primary

#3F33AB

secondary

#BBC278

accent

#DD4ACF

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F33AB

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

Preview Lab → · Contrast checker → · Palette generator →