#3F41BD#3F41BD

#3F41BD is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.6% C 0.189 H 275.2°. Best body text is #FFFFFF at 7.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F41BD
RGB	rgb(63, 65, 189)
HSL	hsl(239, 50%, 49%)
HSV	hsv(239, 67%, 74%)
CMYK	cmyk(66.7%, 65.6%, 0%, 25.9%)
CIE-LAB	lab(35.02, 38.49, -65.38)
CIE-LCH	lch(35.02, 75.87, 300.49°)
OKLab	oklab(45.57% 0.0171 -0.1887)
OKLCH	oklch(45.57% 0.189 275.2)
XYZ	xyz(13.1225, 8.5103, 49.0854)
Luminance	0.0851 (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

#3F41BD #BDBB3F

analogous

#3F80BD #3F41BD #7C3FBD

triadic

#3F41BD #BD3F41 #41BD3F

tetradic

#3F41BD #BD3F80 #BDBB3F #3FBD7C

square

#3F41BD #BD3F80 #BDBB3F #3FBD7C

split-complementary

#3F41BD #BD7C3F #80BD3F

monochromatic

#202161 #30318F #3F41BD #6B6DCE #999ADD

Accessibility & contrast

On white

7.77

#3F41BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#3F41BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41BD

7.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41BD	#FFFFFF	#000000	##FFFFFF
##3F41BD	1.00	7.77	2.70	7.77
#FFFFFF	7.77	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C1

Deuteranopia (green-blind)

#004DBB

Tritanopia (blue-blind)

#006179

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f41bd;
/* rgb */ color: rgb(63, 65, 189);
/* oklch */ color: oklch(45.6% 0.189 275.2);

Tailwind

colors: {
  custom: {
    50: '#8476d2',
    500: '#3f41bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f41bd;
$custom-light: #8476d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41bd",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 189
  },
  "hsl": {
    "h": 239.048,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.45571,
    "c": 0.18945,
    "h": 275.2
  },
  "luminance": 0.08511
}

Semantic roles & 50–950 ramp

primary

#3F41BD

secondary

#C9C88F

accent

#D74EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3F41BD

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

Preview Lab → · Contrast checker → · Palette generator →