#3F33AA#3F33AA

#3F33AA is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.6% C 0.181 H 279.5°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#3F33AA
RGB	rgb(63, 51, 170)
HSL	hsl(246, 54%, 43%)
HSV	hsv(246, 70%, 67%)
CMYK	cmyk(62.9%, 70%, 0%, 33.3%)
CIE-LAB	lab(30.22, 40.59, -61.97)
CIE-LCH	lch(30.22, 74.08, 303.22°)
OKLab	oklab(41.58% 0.0301 -0.1787)
OKLCH	oklch(41.58% 0.181 279.5)
XYZ	xyz(10.4871, 6.3259, 38.6908)
Luminance	0.0633 (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

#3F33AA #9EAA33

analogous

#3363AA #3F33AA #7A33AA

triadic

#3F33AA #AA3F33 #33AA3F

tetradic

#3F33AA #AA3363 #9EAA33 #33AA7A

square

#3F33AA #AA3363 #9EAA33 #33AA7A

split-complementary

#3F33AA #AA7A33 #63AA33

monochromatic

#1C174C #2E257B #3F33AA #5C50CA #887FD9

Accessibility & contrast

On white

9.27

#3F33AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#3F33AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33AA

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33AA	#FFFFFF	#000000	##FFFFFF
##3F33AA	1.00	9.27	2.27	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CAE

Deuteranopia (green-blind)

#0042A8

Tritanopia (blue-blind)

#00536A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3f33aa;
/* rgb */ color: rgb(63, 51, 170);
/* oklch */ color: oklch(41.6% 0.181 279.5);

Tailwind

colors: {
  custom: {
    50: '#816cc4',
    500: '#3f33aa',
    950: '#000000',
  },
}

SCSS

$custom: #3f33aa;
$custom-light: #816cc4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33aa",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 170
  },
  "hsl": {
    "h": 246.05,
    "s": 53.846,
    "l": 43.333
  },
  "oklch": {
    "l": 0.41579,
    "c": 0.18121,
    "h": 279.5
  },
  "luminance": 0.06327
}

Semantic roles & 50–950 ramp

primary

#3F33AA

secondary

#BAC277

accent

#DD4BCE

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F33AA

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

Preview Lab → · Contrast checker → · Palette generator →