#3F4BB9#3F4BB9

#3F4BB9 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 47.0% C 0.172 H 273.1°. Best body text is #FFFFFF at 7.20:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BB9
RGB	rgb(63, 75, 185)
HSL	hsl(234, 49%, 49%)
HSV	hsv(234, 66%, 73%)
CMYK	cmyk(65.9%, 59.5%, 0%, 27.5%)
CIE-LAB	lab(37.10, 30.84, -59.64)
CIE-LCH	lch(37.10, 67.15, 297.35°)
OKLab	oklab(46.99% 0.0093 -0.1718)
OKLCH	oklch(46.99% 0.172 273.1)
XYZ	xyz(13.3200, 9.5905, 47.0387)
Luminance	0.0959 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.96

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BB9 #B9AD3F

analogous

#3F88B9 #3F4BB9 #703FB9

triadic

#3F4BB9 #B93F4B #4BB93F

tetradic

#3F4BB9 #B93F88 #B9AD3F #3FB970

square

#3F4BB9 #B93F88 #B9AD3F #3FB970

split-complementary

#3F4BB9 #B9703F #88B93F

monochromatic

#20265E #2F388B #3F4BB9 #6973CC #979EDC

Accessibility & contrast

On white

7.20

#3F4BB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#3F4BB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BB9

7.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BB9	#FFFFFF	#000000	##FFFFFF
##3F4BB9	1.00	7.20	2.92	7.20
#FFFFFF	7.20	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBD

Deuteranopia (green-blind)

#0052B7

Tritanopia (blue-blind)

#00667A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4bb9;
/* rgb */ color: rgb(63, 75, 185);
/* oklch */ color: oklch(47.0% 0.172 273.1);

Tailwind

colors: {
  custom: {
    50: '#827dcf',
    500: '#3f4bb9',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bb9;
$custom-light: #827dcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bb9",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 185
  },
  "hsl": {
    "h": 234.098,
    "s": 49.194,
    "l": 48.627
  },
  "oklch": {
    "l": 0.46992,
    "c": 0.17202,
    "h": 273.1
  },
  "luminance": 0.09592
}

Semantic roles & 50–950 ramp

primary

#3F4BB9

secondary

#C7C18D

accent

#CB4FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F4BB9

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

Preview Lab → · Contrast checker → · Palette generator →