#3F41BA#3F41BA

#3F41BA is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.3% C 0.186 H 275.4°. Best body text is #FFFFFF at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F41BA
RGB	rgb(63, 65, 186)
HSL	hsl(239, 49%, 49%)
HSV	hsv(239, 66%, 73%)
CMYK	cmyk(66.1%, 65.1%, 0%, 27.1%)
CIE-LAB	lab(34.76, 37.47, -64.04)
CIE-LCH	lch(34.76, 74.20, 300.34°)
OKLab	oklab(45.3% 0.0173 -0.1847)
OKLCH	oklch(45.3% 0.186 275.4)
XYZ	xyz(12.8002, 8.3814, 47.3881)
Luminance	0.0838 (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

#3F41BA #BAB83F

analogous

#3F7FBA #3F41BA #7B3FBA

triadic

#3F41BA #BA3F41 #41BA3F

tetradic

#3F41BA #BA3F7F #BAB83F #3FBA7B

square

#3F41BA #BA3F7F #BAB83F #3FBA7B

split-complementary

#3F41BA #BA7B3F #7FBA3F

monochromatic

#20215F #30318C #3F41BA #6A6BCC #9799DC

Accessibility & contrast

On white

7.85

#3F41BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#3F41BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41BA

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41BA	#FFFFFF	#000000	##FFFFFF
##3F41BA	1.00	7.85	2.68	7.85
#FFFFFF	7.85	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BE

Deuteranopia (green-blind)

#004CB8

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f41ba;
/* rgb */ color: rgb(63, 65, 186);
/* oklch */ color: oklch(45.3% 0.186 275.4);

Tailwind

colors: {
  custom: {
    50: '#8376d0',
    500: '#3f41ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f41ba;
$custom-light: #8376d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41ba",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 186
  },
  "hsl": {
    "h": 239.024,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.45303,
    "c": 0.18556,
    "h": 275.4
  },
  "luminance": 0.08383
}

Semantic roles & 50–950 ramp

primary

#3F41BA

secondary

#C8C78D

accent

#D74FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3F41BA

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

Preview Lab → · Contrast checker → · Palette generator →