#3F41BC#3F41BC

#3F41BC is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.5% C 0.188 H 275.2°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#3F41BC
RGB	rgb(63, 65, 188)
HSL	hsl(239, 50%, 49%)
HSV	hsv(239, 66%, 74%)
CMYK	cmyk(66.5%, 65.4%, 0%, 26.3%)
CIE-LAB	lab(34.94, 38.15, -64.94)
CIE-LCH	lch(34.94, 75.31, 300.44°)
OKLab	oklab(45.48% 0.0172 -0.1874)
OKLCH	oklch(45.48% 0.188 275.2)
XYZ	xyz(13.0143, 8.4670, 48.5157)
Luminance	0.0847 (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

#3F41BC #BCBA3F

analogous

#3F80BC #3F41BC #7C3FBC

triadic

#3F41BC #BC3F41 #41BC3F

tetradic

#3F41BC #BC3F80 #BCBA3F #3FBC7C

square

#3F41BC #BC3F80 #BCBA3F #3FBC7C

split-complementary

#3F41BC #BC7C3F #80BC3F

monochromatic

#202160 #30318E #3F41BC #6B6CCD #999ADD

Accessibility & contrast

On white

7.80

#3F41BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#3F41BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41BC

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41BC	#FFFFFF	#000000	##FFFFFF
##3F41BC	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C0

Deuteranopia (green-blind)

#004DBA

Tritanopia (blue-blind)

#006179

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f41bc;
/* rgb */ color: rgb(63, 65, 188);
/* oklch */ color: oklch(45.5% 0.188 275.2);

Tailwind

colors: {
  custom: {
    50: '#8376d1',
    500: '#3f41bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f41bc;
$custom-light: #8376d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41bc",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 188
  },
  "hsl": {
    "h": 239.04,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.45481,
    "c": 0.18815,
    "h": 275.2
  },
  "luminance": 0.08468
}

Semantic roles & 50–950 ramp

primary

#3F41BC

secondary

#C9C88E

accent

#D74ED9

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3F41BC

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

Preview Lab → · Contrast checker → · Palette generator →