#3F41C0#3F41C0

#3F41C0 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.8% C 0.193 H 275.0°. Best body text is #FFFFFF at 7.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F41C0
RGB	rgb(63, 65, 192)
HSL	hsl(239, 51%, 50%)
HSV	hsv(239, 67%, 75%)
CMYK	cmyk(67.2%, 66.1%, 0%, 24.7%)
CIE-LAB	lab(35.29, 39.51, -66.71)
CIE-LCH	lch(35.29, 77.53, 300.63°)
OKLab	oklab(45.84% 0.0168 -0.1926)
OKLCH	oklch(45.84% 0.193 275)
XYZ	xyz(13.4515, 8.6419, 50.8181)
Luminance	0.0864 (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

#3F41C0 #C0BE3F

analogous

#3F81C0 #3F41C0 #7E3FC0

triadic

#3F41C0 #C03F41 #41C03F

tetradic

#3F41C0 #C03F81 #C0BE3F #3FC07E

square

#3F41C0 #C03F81 #C0BE3F #3FC07E

split-complementary

#3F41C0 #C07E3F #81C03F

monochromatic

#212264 #303192 #3F41C0 #6D6FCF #9B9CDE

Accessibility & contrast

On white

7.70

#3F41C0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#3F41C0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41C0

7.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41C0	#FFFFFF	#000000	##FFFFFF
##3F41C0	1.00	7.70	2.73	7.70
#FFFFFF	7.70	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059C4

Deuteranopia (green-blind)

#004DBE

Tritanopia (blue-blind)

#00627B

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f41c0;
/* rgb */ color: rgb(63, 65, 192);
/* oklch */ color: oklch(45.8% 0.193 275.0);

Tailwind

colors: {
  custom: {
    50: '#8476d4',
    500: '#3f41c0',
    950: '#000000',
  },
}

SCSS

$custom: #3f41c0;
$custom-light: #8476d4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41c0",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 192
  },
  "hsl": {
    "h": 239.07,
    "s": 50.588,
    "l": 50
  },
  "oklch": {
    "l": 0.45842,
    "c": 0.19331,
    "h": 275
  },
  "luminance": 0.08643
}

Semantic roles & 50–950 ramp

primary

#3F41C0

secondary

#CAC991

accent

#D84EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3F41C0

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

Preview Lab → · Contrast checker → · Palette generator →