#3F39B3#3F39B3

#3F39B3 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.4% C 0.186 H 277.5°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F39B3
RGB	rgb(63, 57, 179)
HSL	hsl(243, 52%, 46%)
HSV	hsv(243, 68%, 70%)
CMYK	cmyk(64.8%, 68.2%, 0%, 29.8%)
CIE-LAB	lab(32.34, 39.99, -63.87)
CIE-LCH	lch(32.34, 75.35, 302.05°)
OKLab	oklab(43.35% 0.0242 -0.1843)
OKLCH	oklch(43.35% 0.186 277.5)
XYZ	xyz(11.6471, 7.2367, 43.4221)
Luminance	0.0724 (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

#3F39B3 #ADB339

analogous

#3970B3 #3F39B3 #7C39B3

triadic

#3F39B3 #B33F39 #39B33F

tetradic

#3F39B3 #B33970 #ADB339 #39B37C

square

#3F39B3 #B33970 #ADB339 #39B37C

split-complementary

#3F39B3 #B37C39 #70B339

monochromatic

#1E1B56 #2F2A85 #3F39B3 #635ECC #908CDA

Accessibility & contrast

On white

8.58

#3F39B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#3F39B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F39B3

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F39B3	#FFFFFF	#000000	##FFFFFF
##3F39B3	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B7

Deuteranopia (green-blind)

#0047B1

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f39b3;
/* rgb */ color: rgb(63, 57, 179);
/* oklch */ color: oklch(43.4% 0.186 277.5);

Tailwind

colors: {
  custom: {
    50: '#8270cb',
    500: '#3f39b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f39b3;
$custom-light: #8270cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f39b3",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 179
  },
  "hsl": {
    "h": 242.951,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43354,
    "c": 0.18585,
    "h": 277.5
  },
  "luminance": 0.07238
}

Semantic roles & 50–950 ramp

primary

#3F39B3

secondary

#C2C583

accent

#DB4DD4

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F39B3

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

Preview Lab → · Contrast checker → · Palette generator →