#3F47D9#3F47D9

#3F47D9 is a mid, highly saturated blue. Relative luminance 0.106; OKLCH L 49.1% C 0.218 H 272.7°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F47D9
RGB	rgb(63, 71, 217)
HSL	hsl(237, 67%, 55%)
HSV	hsv(237, 71%, 85%)
CMYK	cmyk(71%, 67.3%, 0%, 14.9%)
CIE-LAB	lab(38.85, 44.32, -75.36)
CIE-LCH	lch(38.85, 87.43, 300.46°)
OKLab	oklab(49.11% 0.0103 -0.2179)
OKLCH	oklch(49.11% 0.218 272.7)
XYZ	xyz(16.8233, 10.5713, 66.7860)
Luminance	0.1057 (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

#3F47D9 #D9D13F

analogous

#3F94D9 #3F47D9 #843FD9

triadic

#3F47D9 #D93F47 #47D93F

tetradic

#3F47D9 #D93F94 #D9D13F #3FD984

square

#3F47D9 #D93F94 #D9D13F #3FD984

split-complementary

#3F47D9 #D9843F #94D93F

monochromatic

#1A2084 #242CB7 #3F47D9 #7278E3 #A5A9ED

Accessibility & contrast

On white

6.74

#3F47D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3F47D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F47D9

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47D9	#FFFFFF	#000000	##FFFFFF
##3F47D9	1.00	6.74	3.11	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063DD

Deuteranopia (green-blind)

#0054D6

Tritanopia (blue-blind)

#006E8A

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f47d9;
/* rgb */ color: rgb(63, 71, 217);
/* oklch */ color: oklch(49.1% 0.218 272.7);

Tailwind

colors: {
  custom: {
    50: '#897be6',
    500: '#3f47d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f47d9;
$custom-light: #897be6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47d9",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 217
  },
  "hsl": {
    "h": 236.883,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.49106,
    "c": 0.21812,
    "h": 272.7
  },
  "luminance": 0.10573
}

Semantic roles & 50–950 ramp

primary

#3F47D9

secondary

#DAD79A

accent

#E13EEA

background

#F9F7FE

surface

#F2EEFD

border

#CCC9D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F47D9

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

Preview Lab → · Contrast checker → · Palette generator →