#3F47D8#3F47D8

#3F47D8 is a mid, highly saturated blue. Relative luminance 0.105; OKLCH L 49.0% C 0.217 H 272.7°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F47D8
RGB	rgb(63, 71, 216)
HSL	hsl(237, 66%, 55%)
HSV	hsv(237, 71%, 85%)
CMYK	cmyk(70.8%, 67.1%, 0%, 15.3%)
CIE-LAB	lab(38.76, 43.98, -74.94)
CIE-LCH	lch(38.76, 86.89, 300.41°)
OKLab	oklab(49.01% 0.0104 -0.2166)
OKLCH	oklch(49.01% 0.217 272.7)
XYZ	xyz(16.6936, 10.5195, 66.1031)
Luminance	0.1052 (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

#3F47D8 #D8D03F

analogous

#3F93D8 #3F47D8 #843FD8

triadic

#3F47D8 #D83F47 #47D83F

tetradic

#3F47D8 #D83F93 #D8D03F #3FD884

square

#3F47D8 #D83F93 #D8D03F #3FD884

split-complementary

#3F47D8 #D8843F #93D83F

monochromatic

#1A2082 #252CB5 #3F47D8 #7278E2 #A5A8ED

Accessibility & contrast

On white

6.77

#3F47D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#3F47D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F47D8

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47D8	#FFFFFF	#000000	##FFFFFF
##3F47D8	1.00	6.77	3.10	6.77
#FFFFFF	6.77	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062DC

Deuteranopia (green-blind)

#0054D5

Tritanopia (blue-blind)

#006E8A

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f47d8;
/* rgb */ color: rgb(63, 71, 216);
/* oklch */ color: oklch(49.0% 0.217 272.7);

Tailwind

colors: {
  custom: {
    50: '#897be5',
    500: '#3f47d8',
    950: '#000000',
  },
}

SCSS

$custom: #3f47d8;
$custom-light: #897be5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47d8",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 216
  },
  "hsl": {
    "h": 236.863,
    "s": 66.234,
    "l": 54.706
  },
  "oklch": {
    "l": 0.49014,
    "c": 0.21688,
    "h": 272.7
  },
  "luminance": 0.10521
}

Semantic roles & 50–950 ramp

primary

#3F47D8

secondary

#DAD699

accent

#E03FE9

background

#F9F7FE

surface

#F1EEFC

border

#CBC9D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F47D8

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

Preview Lab → · Contrast checker → · Palette generator →