#3F4BB8#3F4BB8

#3F4BB8 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.9% C 0.171 H 273.1°. Best body text is #FFFFFF at 7.22:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BB8
RGB	rgb(63, 75, 184)
HSL	hsl(234, 49%, 48%)
HSV	hsv(234, 66%, 72%)
CMYK	cmyk(65.8%, 59.2%, 0%, 27.8%)
CIE-LAB	lab(37.02, 30.49, -59.18)
CIE-LCH	lch(37.02, 66.58, 297.26°)
OKLab	oklab(46.91% 0.0093 -0.1704)
OKLCH	oklch(46.91% 0.171 273.1)
XYZ	xyz(13.2148, 9.5484, 46.4847)
Luminance	0.0955 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.04

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BB8 #B8AC3F

analogous

#3F87B8 #3F4BB8 #6F3FB8

triadic

#3F4BB8 #B83F4B #4BB83F

tetradic

#3F4BB8 #B83F87 #B8AC3F #3FB86F

square

#3F4BB8 #B83F87 #B8AC3F #3FB86F

split-complementary

#3F4BB8 #B86F3F #87B83F

monochromatic

#20265D #2F388A #3F4BB8 #6972CC #969DDB

Accessibility & contrast

On white

7.22

#3F4BB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#3F4BB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BB8

7.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BB8	#FFFFFF	#000000	##FFFFFF
##3F4BB8	1.00	7.22	2.91	7.22
#FFFFFF	7.22	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBC

Deuteranopia (green-blind)

#0052B6

Tritanopia (blue-blind)

#00667A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4bb8;
/* rgb */ color: rgb(63, 75, 184);
/* oklch */ color: oklch(46.9% 0.171 273.1);

Tailwind

colors: {
  custom: {
    50: '#827dce',
    500: '#3f4bb8',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bb8;
$custom-light: #827dce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bb8",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 184
  },
  "hsl": {
    "h": 234.05,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.4691,
    "c": 0.17067,
    "h": 273.1
  },
  "luminance": 0.0955
}

Semantic roles & 50–950 ramp

primary

#3F4BB8

secondary

#C7C18C

accent

#CB4FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F4BB8

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

Preview Lab → · Contrast checker → · Palette generator →