#3F4FBB#3F4FBB

#3F4FBB is a mid, vivid blue. Relative luminance 0.102; OKLCH L 47.9% C 0.170 H 272.0°. Best body text is #FFFFFF at 6.89:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FBB
RGB	rgb(63, 79, 187)
HSL	hsl(232, 50%, 49%)
HSV	hsv(232, 66%, 73%)
CMYK	cmyk(66.3%, 57.8%, 0%, 26.7%)
CIE-LAB	lab(38.26, 28.99, -58.93)
CIE-LCH	lch(38.26, 65.67, 296.19°)
OKLab	oklab(47.91% 0.0059 -0.1696)
OKLCH	oklch(47.91% 0.17 272)
XYZ	xyz(13.8125, 10.2353, 48.2518)
Luminance	0.1024 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FBB #BBAB3F

analogous

#3F8DBB #3F4FBB #6D3FBB

triadic

#3F4FBB #BB3F4F #4FBB3F

tetradic

#3F4FBB #BB3F8D #BBAB3F #3FBB6D

square

#3F4FBB #BB3F8D #BBAB3F #3FBB6D

split-complementary

#3F4FBB #BB6D3F #8DBB3F

monochromatic

#20285F #303C8D #3F4FBB #6A77CD #98A1DC

Accessibility & contrast

On white

6.89

#3F4FBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#3F4FBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4FBB

6.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FBB	#FFFFFF	#000000	##FFFFFF
##3F4FBB	1.00	6.89	3.05	6.89
#FFFFFF	6.89	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060BF

Deuteranopia (green-blind)

#0055B9

Tritanopia (blue-blind)

#00697D

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f4fbb;
/* rgb */ color: rgb(63, 79, 187);
/* oklch */ color: oklch(47.9% 0.170 272.0);

Tailwind

colors: {
  custom: {
    50: '#8280d0',
    500: '#3f4fbb',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fbb;
$custom-light: #8280d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fbb",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 187
  },
  "hsl": {
    "h": 232.258,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.47906,
    "c": 0.16972,
    "h": 272
  },
  "luminance": 0.10237
}

Semantic roles & 50–950 ramp

primary

#3F4FBB

secondary

#C8C18E

accent

#C74FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F4FBB

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

Preview Lab → · Contrast checker → · Palette generator →