#3F47E0#3F47E0

#3F47E0 is a mid, highly saturated blue. Relative luminance 0.109; OKLCH L 49.8% C 0.227 H 272.4°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F47E0
RGB	rgb(63, 71, 224)
HSL	hsl(237, 72%, 56%)
HSV	hsv(237, 72%, 88%)
CMYK	cmyk(71.9%, 68.3%, 0%, 12.2%)
CIE-LAB	lab(39.48, 46.65, -78.32)
CIE-LCH	lch(39.48, 91.17, 300.78°)
OKLab	oklab(49.76% 0.0095 -0.2265)
OKLCH	oklch(49.76% 0.227 272.4)
XYZ	xyz(17.7532, 10.9433, 71.6832)
Luminance	0.1095 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.02

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F47E0 #E0D83F

analogous

#3F98E0 #3F47E0 #883FE0

triadic

#3F47E0 #E03F47 #47E03F

tetradic

#3F47E0 #E03F98 #E0D83F #3FE088

square

#3F47E0 #E03F98 #E0D83F #3FE088

split-complementary

#3F47E0 #E0883F #98E03F

monochromatic

#171D8E #1F27C2 #3F47E0 #7479E9 #A8ACF1

Accessibility & contrast

On white

6.59

#3F47E0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F47E0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F47E0

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47E0	#FFFFFF	#000000	##FFFFFF
##3F47E0	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065E5

Deuteranopia (green-blind)

#0055DD

Tritanopia (blue-blind)

#00718E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f47e0;
/* rgb */ color: rgb(63, 71, 224);
/* oklch */ color: oklch(49.8% 0.227 272.4);

Tailwind

colors: {
  custom: {
    50: '#8a7beb',
    500: '#3f47e0',
    950: '#000000',
  },
}

SCSS

$custom: #3f47e0;
$custom-light: #8a7beb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47e0",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 224
  },
  "hsl": {
    "h": 237.019,
    "s": 72.197,
    "l": 56.275
  },
  "oklch": {
    "l": 0.49759,
    "c": 0.22673,
    "h": 272.4
  },
  "luminance": 0.10945
}

Semantic roles & 50–950 ramp

primary

#3F47E0

secondary

#DFDB9C

accent

#E639EF

background

#F9F7FE

surface

#F2EEFD

border

#CCC9D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #3F47E0

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

Preview Lab → · Contrast checker → · Palette generator →