#3F21B4#3F21B4

#3F21B4 is a dark, highly saturated violet. Relative luminance 0.054; OKLCH L 40.3% C 0.211 H 280.6°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#3F21B4
RGB	rgb(63, 33, 180)
HSL	hsl(252, 69%, 42%)
HSV	hsv(252, 82%, 71%)
CMYK	cmyk(65%, 81.7%, 0%, 29.4%)
CIE-LAB	lab(27.95, 52.96, -71.69)
CIE-LCH	lch(27.95, 89.13, 306.45°)
OKLab	oklab(40.28% 0.0388 -0.2069)
OKLCH	oklch(40.28% 0.211 280.6)
XYZ	xyz(10.8294, 5.4389, 43.6503)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F21B4 #96B421

analogous

#214DB4 #3F21B4 #8921B4

triadic

#3F21B4 #B43F21 #21B43F

tetradic

#3F21B4 #B4214D #96B421 #21B489

square

#3F21B4 #B4214D #96B421 #21B489

split-complementary

#3F21B4 #B48921 #4DB421

monochromatic

#1B0E4D #2D1880 #3F21B4 #5938DA #846BE4

Accessibility & contrast

On white

10.06

#3F21B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#3F21B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F21B4

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F21B4	#FFFFFF	#000000	##FFFFFF
##3F21B4	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047B8

Deuteranopia (green-blind)

#003CB1

Tritanopia (blue-blind)

#004F6C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3f21b4;
/* rgb */ color: rgb(63, 33, 180);
/* oklch */ color: oklch(40.3% 0.211 280.6);

Tailwind

colors: {
  custom: {
    50: '#8462cc',
    500: '#3f21b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f21b4;
$custom-light: #8462cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f21b4",
  "rgb": {
    "r": 63,
    "g": 33,
    "b": 180
  },
  "hsl": {
    "h": 252.245,
    "s": 69.014,
    "l": 41.765
  },
  "oklch": {
    "l": 0.40282,
    "c": 0.21054,
    "h": 280.6
  },
  "luminance": 0.0544
}

Semantic roles & 50–950 ramp

primary

#3F21B4

secondary

#B6CA67

accent

#EC3CC8

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0514

muted

#7D7A82

Preview Lab

Preview with #3F21B4

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

Preview Lab → · Contrast checker → · Palette generator →