#3F3CB3#3F3CB3

#3F3CB3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.8% C 0.182 H 276.9°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#3F3CB3
RGB	rgb(63, 60, 179)
HSL	hsl(242, 50%, 47%)
HSV	hsv(242, 66%, 70%)
CMYK	cmyk(64.8%, 66.5%, 0%, 29.8%)
CIE-LAB	lab(33.01, 38.18, -62.77)
CIE-LCH	lch(33.01, 73.47, 301.31°)
OKLab	oklab(43.84% 0.0219 -0.181)
OKLCH	oklch(43.84% 0.182 276.9)
XYZ	xyz(11.7998, 7.5422, 43.4730)
Luminance	0.0754 (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

#3F3CB3 #B0B33C

analogous

#3C74B3 #3F3CB3 #7B3CB3

triadic

#3F3CB3 #B33F3C #3CB33F

tetradic

#3F3CB3 #B33C74 #B0B33C #3CB37B

square

#3F3CB3 #B33C74 #B0B33C #3CB37B

split-complementary

#3F3CB3 #B37B3C #74B33C

monochromatic

#1F1D57 #2F2D85 #3F3CB3 #6562CA #9290DA

Accessibility & contrast

On white

8.37

#3F3CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3F3CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3CB3

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3CB3	#FFFFFF	#000000	##FFFFFF
##3F3CB3	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f3cb3;
/* rgb */ color: rgb(63, 60, 179);
/* oklch */ color: oklch(43.8% 0.182 276.9);

Tailwind

colors: {
  custom: {
    50: '#8272cb',
    500: '#3f3cb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f3cb3;
$custom-light: #8272cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3cb3",
  "rgb": {
    "r": 63,
    "g": 60,
    "b": 179
  },
  "hsl": {
    "h": 241.513,
    "s": 49.791,
    "l": 46.863
  },
  "oklch": {
    "l": 0.4384,
    "c": 0.18236,
    "h": 276.9
  },
  "luminance": 0.07543
}

Semantic roles & 50–950 ramp

primary

#3F3CB3

secondary

#C3C586

accent

#D94ED6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #3F3CB3

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

Preview Lab → · Contrast checker → · Palette generator →