#3F46E0#3F46E0

#3F46E0 is a mid, highly saturated blue. Relative luminance 0.108; OKLCH L 49.6% C 0.228 H 272.5°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F46E0
RGB	rgb(63, 70, 224)
HSL	hsl(237, 72%, 56%)
HSV	hsv(237, 72%, 88%)
CMYK	cmyk(71.9%, 68.8%, 0%, 12.2%)
CIE-LAB	lab(39.27, 47.24, -78.68)
CIE-LCH	lch(39.27, 91.77, 300.98°)
OKLab	oklab(49.61% 0.01 -0.2275)
OKLCH	oklch(49.61% 0.228 272.5)
XYZ	xyz(17.6901, 10.8171, 71.6622)
Luminance	0.1082 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 4.84

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F46E0 #E0D93F

analogous

#3F97E0 #3F46E0 #893FE0

triadic

#3F46E0 #E03F46 #46E03F

tetradic

#3F46E0 #E03F97 #E0D93F #3FE089

square

#3F46E0 #E03F97 #E0D93F #3FE089

split-complementary

#3F46E0 #E0893F #97E03F

monochromatic

#171C8E #1F26C2 #3F46E0 #7479E9 #A8ACF1

Accessibility & contrast

On white

6.64

#3F46E0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#3F46E0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F46E0

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46E0	#FFFFFF	#000000	##FFFFFF
##3F46E0	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064E5

Deuteranopia (green-blind)

#0055DD

Tritanopia (blue-blind)

#00708E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f46e0;
/* rgb */ color: rgb(63, 70, 224);
/* oklch */ color: oklch(49.6% 0.228 272.5);

Tailwind

colors: {
  custom: {
    50: '#8b7aeb',
    500: '#3f46e0',
    950: '#000000',
  },
}

SCSS

$custom: #3f46e0;
$custom-light: #8b7aeb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46e0",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 224
  },
  "hsl": {
    "h": 237.391,
    "s": 72.197,
    "l": 56.275
  },
  "oklch": {
    "l": 0.49605,
    "c": 0.22777,
    "h": 272.5
  },
  "luminance": 0.10819
}

Semantic roles & 50–950 ramp

primary

#3F46E0

secondary

#DFDC9C

accent

#E739EF

background

#F9F7FE

surface

#F2EEFD

border

#CCC9D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #3F46E0

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

Preview Lab → · Contrast checker → · Palette generator →