#3F33B2#3F33B2

#3F33B2 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.3% C 0.191 H 278.6°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#3F33B2
RGB	rgb(63, 51, 178)
HSL	hsl(246, 55%, 45%)
HSV	hsv(246, 71%, 70%)
CMYK	cmyk(64.6%, 71.3%, 0%, 30.2%)
CIE-LAB	lab(30.97, 43.17, -65.53)
CIE-LCH	lch(30.97, 78.47, 303.38°)
OKLab	oklab(42.34% 0.0287 -0.1891)
OKLCH	oklch(42.34% 0.191 278.6)
XYZ	xyz(11.2670, 6.6379, 42.7983)
Luminance	0.0664 (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

#3F33B2 #A6B233

analogous

#3367B2 #3F33B2 #7E33B2

triadic

#3F33B2 #B23F33 #33B23F

tetradic

#3F33B2 #B23367 #A6B233 #33B27E

square

#3F33B2 #B23367 #A6B233 #33B27E

split-complementary

#3F33B2 #B27E33 #67B233

monochromatic

#1D1853 #2E2582 #3F33B2 #6054CE #8C84DC

Accessibility & contrast

On white

9.02

#3F33B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3F33B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33B2

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33B2	#FFFFFF	#000000	##FFFFFF
##3F33B2	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB6

Deuteranopia (green-blind)

#0044B0

Tritanopia (blue-blind)

#00566F

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3f33b2;
/* rgb */ color: rgb(63, 51, 178);
/* oklch */ color: oklch(42.3% 0.191 278.6);

Tailwind

colors: {
  custom: {
    50: '#836cca',
    500: '#3f33b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f33b2;
$custom-light: #836cca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33b2",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 178
  },
  "hsl": {
    "h": 245.669,
    "s": 55.459,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42341,
    "c": 0.19127,
    "h": 278.6
  },
  "luminance": 0.06639
}

Semantic roles & 50–950 ramp

primary

#3F33B2

secondary

#BEC57C

accent

#DF49D1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F33B2

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

Preview Lab → · Contrast checker → · Palette generator →