#3F49BF#3F49BF

#3F49BF is a mid, vivid blue. Relative luminance 0.096; OKLCH L 47.1% C 0.183 H 273.4°. Best body text is #FFFFFF at 7.20:1 contrast (WCAG AA passes).

Color values

HEX	#3F49BF
RGB	rgb(63, 73, 191)
HSL	hsl(235, 50%, 50%)
HSV	hsv(235, 67%, 75%)
CMYK	cmyk(67%, 61.8%, 0%, 25.1%)
CIE-LAB	lab(37.08, 34.20, -63.19)
CIE-LCH	lch(37.08, 71.85, 298.43°)
OKLab	oklab(47.13% 0.0108 -0.1822)
OKLCH	oklch(47.13% 0.183 273.4)
XYZ	xyz(13.8333, 9.5822, 50.4007)
Luminance	0.0958 (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

#3F49BF #BFB53F

analogous

#3F89BF #3F49BF #753FBF

triadic

#3F49BF #BF3F49 #49BF3F

tetradic

#3F49BF #BF3F89 #BFB53F #3FBF75

square

#3F49BF #BF3F89 #BFB53F #3FBF75

split-complementary

#3F49BF #BF753F #89BF3F

monochromatic

#212663 #303791 #3F49BF #6D74CF #9BA0DE

Accessibility & contrast

On white

7.20

#3F49BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#3F49BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F49BF

7.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F49BF	#FFFFFF	#000000	##FFFFFF
##3F49BF	1.00	7.20	2.92	7.20
#FFFFFF	7.20	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DC3

Deuteranopia (green-blind)

#0052BD

Tritanopia (blue-blind)

#00677D

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f49bf;
/* rgb */ color: rgb(63, 73, 191);
/* oklch */ color: oklch(47.1% 0.183 273.4);

Tailwind

colors: {
  custom: {
    50: '#837cd3',
    500: '#3f49bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f49bf;
$custom-light: #837cd3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f49bf",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 191
  },
  "hsl": {
    "h": 235.313,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.4713,
    "c": 0.18253,
    "h": 273.4
  },
  "luminance": 0.09583
}

Semantic roles & 50–950 ramp

primary

#3F49BF

secondary

#CAC590

accent

#CF4EDA

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3F49BF

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

Preview Lab → · Contrast checker → · Palette generator →