#3F4CB8#3F4CB8

#3F4CB8 is a mid, vivid blue. Relative luminance 0.097; OKLCH L 47.1% C 0.169 H 272.9°. Best body text is #FFFFFF at 7.15:1 contrast (WCAG AA passes).

Color values

HEX	#3F4CB8
RGB	rgb(63, 76, 184)
HSL	hsl(234, 49%, 48%)
HSV	hsv(234, 66%, 72%)
CMYK	cmyk(65.8%, 58.7%, 0%, 27.8%)
CIE-LAB	lab(37.27, 29.85, -58.77)
CIE-LCH	lch(37.27, 65.92, 296.93°)
OKLab	oklab(47.1% 0.0084 -0.1692)
OKLCH	oklch(47.1% 0.169 272.9)
XYZ	xyz(13.2832, 9.6852, 46.5075)
Luminance	0.0969 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4CB8 #B8AB3F

analogous

#3F88B8 #3F4CB8 #6E3FB8

triadic

#3F4CB8 #B83F4C #4CB83F

tetradic

#3F4CB8 #B83F88 #B8AB3F #3FB86E

square

#3F4CB8 #B83F88 #B8AB3F #3FB86E

split-complementary

#3F4CB8 #B86E3F #88B83F

monochromatic

#20265D #2F398A #3F4CB8 #6973CC #969EDB

Accessibility & contrast

On white

7.15

#3F4CB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#3F4CB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4CB8

7.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4CB8	#FFFFFF	#000000	##FFFFFF
##3F4CB8	1.00	7.15	2.94	7.15
#FFFFFF	7.15	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBC

Deuteranopia (green-blind)

#0052B6

Tritanopia (blue-blind)

#00667A

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f4cb8;
/* rgb */ color: rgb(63, 76, 184);
/* oklch */ color: oklch(47.1% 0.169 272.9);

Tailwind

colors: {
  custom: {
    50: '#827ece',
    500: '#3f4cb8',
    950: '#000000',
  },
}

SCSS

$custom: #3f4cb8;
$custom-light: #827ece;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4cb8",
  "rgb": {
    "r": 63,
    "g": 76,
    "b": 184
  },
  "hsl": {
    "h": 233.554,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.47097,
    "c": 0.16941,
    "h": 272.9
  },
  "luminance": 0.09686
}

Semantic roles & 50–950 ramp

primary

#3F4CB8

secondary

#C7C08C

accent

#CA4FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F4CB8

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

Preview Lab → · Contrast checker → · Palette generator →