#3F33A8#3F33A8

#3F33A8 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.4% C 0.179 H 279.8°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#3F33A8
RGB	rgb(63, 51, 168)
HSL	hsl(246, 53%, 43%)
HSV	hsv(246, 70%, 66%)
CMYK	cmyk(62.5%, 69.6%, 0%, 34.1%)
CIE-LAB	lab(30.04, 39.94, -61.07)
CIE-LCH	lch(30.04, 72.97, 303.19°)
OKLab	oklab(41.39% 0.0304 -0.1761)
OKLCH	oklch(41.39% 0.179 279.8)
XYZ	xyz(10.2994, 6.2508, 37.7020)
Luminance	0.0625 (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

#3F33A8 #9CA833

analogous

#3361A8 #3F33A8 #7933A8

triadic

#3F33A8 #A83F33 #33A83F

tetradic

#3F33A8 #A83361 #9CA833 #33A879

square

#3F33A8 #A83361 #9CA833 #33A879

split-complementary

#3F33A8 #A87933 #61A833

monochromatic

#1C164A #2D2579 #3F33A8 #5B4FC9 #877ED8

Accessibility & contrast

On white

9.33

#3F33A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#3F33A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33A8

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33A8	#FFFFFF	#000000	##FFFFFF
##3F33A8	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BAC

Deuteranopia (green-blind)

#0042A6

Tritanopia (blue-blind)

#005269

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3f33a8;
/* rgb */ color: rgb(63, 51, 168);
/* oklch */ color: oklch(41.4% 0.179 279.8);

Tailwind

colors: {
  custom: {
    50: '#816cc3',
    500: '#3f33a8',
    950: '#000000',
  },
}

SCSS

$custom: #3f33a8;
$custom-light: #816cc3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33a8",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 168
  },
  "hsl": {
    "h": 246.154,
    "s": 53.425,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41391,
    "c": 0.17867,
    "h": 279.8
  },
  "luminance": 0.06252
}

Semantic roles & 50–950 ramp

primary

#3F33A8

secondary

#B9C176

accent

#DD4BCE

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3F33A8

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

Preview Lab → · Contrast checker → · Palette generator →