#3F33B8#3F33B8

#3F33B8 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.9% C 0.199 H 278.0°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F33B8
RGB	rgb(63, 51, 184)
HSL	hsl(245, 57%, 46%)
HSV	hsv(245, 72%, 72%)
CMYK	cmyk(65.8%, 72.3%, 0%, 27.8%)
CIE-LAB	lab(31.54, 45.09, -68.15)
CIE-LCH	lch(31.54, 81.71, 303.49°)
OKLab	oklab(42.92% 0.0276 -0.1968)
OKLCH	oklch(42.92% 0.199 278)
XYZ	xyz(11.8827, 6.8841, 46.0407)
Luminance	0.0688 (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

#3F33B8 #ACB833

analogous

#3369B8 #3F33B8 #8133B8

triadic

#3F33B8 #B83F33 #33B83F

tetradic

#3F33B8 #B83369 #ACB833 #33B881

square

#3F33B8 #B83369 #ACB833 #33B881

split-complementary

#3F33B8 #B88133 #69B833

monochromatic

#1E1858 #2F2688 #3F33B8 #6358D1 #8F88DE

Accessibility & contrast

On white

8.83

#3F33B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3F33B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33B8

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33B8	#FFFFFF	#000000	##FFFFFF
##3F33B8	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050BC

Deuteranopia (green-blind)

#0045B6

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f33b8;
/* rgb */ color: rgb(63, 51, 184);
/* oklch */ color: oklch(42.9% 0.199 278.0);

Tailwind

colors: {
  custom: {
    50: '#846dcf',
    500: '#3f33b8',
    950: '#000000',
  },
}

SCSS

$custom: #3f33b8;
$custom-light: #846dcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33b8",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 184
  },
  "hsl": {
    "h": 245.414,
    "s": 56.596,
    "l": 46.078
  },
  "oklch": {
    "l": 0.42924,
    "c": 0.19869,
    "h": 278
  },
  "luminance": 0.06885
}

Semantic roles & 50–950 ramp

primary

#3F33B8

secondary

#C1C87F

accent

#E048D2

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F33B8

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

Preview Lab → · Contrast checker → · Palette generator →