#3F47B2#3F47B2

#3F47B2 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.7% C 0.168 H 274.4°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F47B2
RGB	rgb(63, 71, 178)
HSL	hsl(236, 48%, 47%)
HSV	hsv(236, 65%, 70%)
CMYK	cmyk(64.6%, 60.1%, 0%, 30.2%)
CIE-LAB	lab(35.55, 30.96, -58.03)
CIE-LCH	lch(35.55, 65.77, 298.08°)
OKLab	oklab(45.68% 0.0128 -0.1671)
OKLCH	oklch(45.68% 0.168 274.4)
XYZ	xyz(12.3364, 8.7765, 43.1548)
Luminance	0.0878 (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

#3F47B2 #B2AA3F

analogous

#3F81B2 #3F47B2 #713FB2

triadic

#3F47B2 #B23F47 #47B23F

tetradic

#3F47B2 #B23F81 #B2AA3F #3FB271

square

#3F47B2 #B23F81 #B2AA3F #3FB271

split-complementary

#3F47B2 #B2713F #81B23F

monochromatic

#1F2358 #2F3585 #3F47B2 #666CC9 #9398D9

Accessibility & contrast

On white

7.62

#3F47B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#3F47B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F47B2

7.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47B2	#FFFFFF	#000000	##FFFFFF
##3F47B2	1.00	7.62	2.76	7.62
#FFFFFF	7.62	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B6

Deuteranopia (green-blind)

#004FB0

Tritanopia (blue-blind)

#006175

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3f47b2;
/* rgb */ color: rgb(63, 71, 178);
/* oklch */ color: oklch(45.7% 0.168 274.4);

Tailwind

colors: {
  custom: {
    50: '#817aca',
    500: '#3f47b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f47b2;
$custom-light: #817aca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47b2",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 178
  },
  "hsl": {
    "h": 235.826,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.45675,
    "c": 0.16756,
    "h": 274.4
  },
  "luminance": 0.08778
}

Semantic roles & 50–950 ramp

primary

#3F47B2

secondary

#C4C089

accent

#CE50D7

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F47B2

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

Preview Lab → · Contrast checker → · Palette generator →