#3F21B3#3F21B3

#3F21B3 is a dark, highly saturated violet. Relative luminance 0.054; OKLCH L 40.2% C 0.209 H 280.8°. Best body text is #FFFFFF at 10.10:1 contrast (WCAG AA passes).

Color values

HEX	#3F21B3
RGB	rgb(63, 33, 179)
HSL	hsl(252, 69%, 42%)
HSV	hsv(252, 82%, 70%)
CMYK	cmyk(64.8%, 81.6%, 0%, 29.8%)
CIE-LAB	lab(27.84, 52.67, -71.28)
CIE-LCH	lch(27.84, 88.63, 306.46°)
OKLab	oklab(40.17% 0.0392 -0.2057)
OKLCH	oklch(40.17% 0.209 280.8)
XYZ	xyz(10.7279, 5.3983, 43.1157)
Luminance	0.0540 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F21B3 #95B321

analogous

#214CB3 #3F21B3 #8821B3

triadic

#3F21B3 #B33F21 #21B33F

tetradic

#3F21B3 #B3214C #95B321 #21B388

square

#3F21B3 #B3214C #95B321 #21B388

split-complementary

#3F21B3 #B38821 #4CB321

monochromatic

#1B0E4C #2D177F #3F21B3 #5937DA #846BE4

Accessibility & contrast

On white

10.10

#3F21B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#3F21B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F21B3

10.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F21B3	#FFFFFF	#000000	##FFFFFF
##3F21B3	1.00	10.10	2.08	10.10
#FFFFFF	10.10	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047B7

Deuteranopia (green-blind)

#003CB0

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3f21b3;
/* rgb */ color: rgb(63, 33, 179);
/* oklch */ color: oklch(40.2% 0.209 280.8);

Tailwind

colors: {
  custom: {
    50: '#8462cb',
    500: '#3f21b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f21b3;
$custom-light: #8462cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f21b3",
  "rgb": {
    "r": 63,
    "g": 33,
    "b": 179
  },
  "hsl": {
    "h": 252.329,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.40174,
    "c": 0.20941,
    "h": 280.8
  },
  "luminance": 0.05399
}

Semantic roles & 50–950 ramp

primary

#3F21B3

secondary

#B5CA66

accent

#EC3CC8

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0513

muted

#7D7A82

Preview Lab

Preview with #3F21B3

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

Preview Lab → · Contrast checker → · Palette generator →