#3F18B4#3F18B4

#3F18B4 is a dark, highly saturated violet. Relative luminance 0.050; OKLCH L 39.5% C 0.217 H 281.3°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#3F18B4
RGB	rgb(63, 24, 180)
HSL	hsl(255, 76%, 40%)
HSV	hsv(255, 87%, 71%)
CMYK	cmyk(65%, 86.7%, 0%, 29.4%)
CIE-LAB	lab(26.75, 56.51, -73.69)
CIE-LCH	lch(26.75, 92.86, 307.48°)
OKLab	oklab(39.46% 0.0427 -0.2126)
OKLCH	oklch(39.46% 0.217 281.3)
XYZ	xyz(10.6122, 5.0045, 43.5779)
Luminance	0.0500 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F18B4 #8DB418

analogous

#183FB4 #3F18B4 #8D18B4

triadic

#3F18B4 #B43F18 #18B43F

tetradic

#3F18B4 #B4183F #8DB418 #18B48D

square

#3F18B4 #B4183F #8DB418 #18B48D

split-complementary

#3F18B4 #B48D18 #3FB418

monochromatic

#190A48 #2C117E #3F18B4 #5627E2 #805DE9

Accessibility & contrast

On white

10.49

#3F18B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#3F18B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F18B4

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F18B4	#FFFFFF	#000000	##FFFFFF
##3F18B4	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B8

Deuteranopia (green-blind)

#003AB1

Tritanopia (blue-blind)

#004C6A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3f18b4;
/* rgb */ color: rgb(63, 24, 180);
/* oklch */ color: oklch(39.5% 0.217 281.3);

Tailwind

colors: {
  custom: {
    50: '#855ecc',
    500: '#3f18b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f18b4;
$custom-light: #855ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f18b4",
  "rgb": {
    "r": 63,
    "g": 24,
    "b": 180
  },
  "hsl": {
    "h": 255,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.39458,
    "c": 0.21682,
    "h": 281.3
  },
  "luminance": 0.05005
}

Semantic roles & 50–950 ramp

primary

#3F18B4

secondary

#B1CD5B

accent

#F335C3

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0D0514

muted

#7D7982

Preview Lab

Preview with #3F18B4

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

Preview Lab → · Contrast checker → · Palette generator →