#3F4DBB#3F4DBB

#3F4DBB is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.5% C 0.172 H 272.5°. Best body text is #FFFFFF at 7.02:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DBB
RGB	rgb(63, 77, 187)
HSL	hsl(233, 50%, 49%)
HSV	hsv(233, 66%, 73%)
CMYK	cmyk(66.3%, 58.8%, 0%, 26.7%)
CIE-LAB	lab(37.75, 30.27, -59.75)
CIE-LCH	lch(37.75, 66.98, 296.87°)
OKLab	oklab(47.53% 0.0076 -0.1721)
OKLCH	oklch(47.53% 0.172 272.5)
XYZ	xyz(13.6704, 9.9511, 48.2044)
Luminance	0.0995 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DBB #BBAD3F

analogous

#3F8BBB #3F4DBB #6F3FBB

triadic

#3F4DBB #BB3F4D #4DBB3F

tetradic

#3F4DBB #BB3F8B #BBAD3F #3FBB6F

square

#3F4DBB #BB3F8B #BBAD3F #3FBB6F

split-complementary

#3F4DBB #BB6F3F #8BBB3F

monochromatic

#20275F #303A8D #3F4DBB #6A75CD #98A0DC

Accessibility & contrast

On white

7.02

#3F4DBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#3F4DBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4DBB

7.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DBB	#FFFFFF	#000000	##FFFFFF
##3F4DBB	1.00	7.02	2.99	7.02
#FFFFFF	7.02	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FBF

Deuteranopia (green-blind)

#0053B9

Tritanopia (blue-blind)

#00687C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f4dbb;
/* rgb */ color: rgb(63, 77, 187);
/* oklch */ color: oklch(47.5% 0.172 272.5);

Tailwind

colors: {
  custom: {
    50: '#827ed0',
    500: '#3f4dbb',
    950: '#000000',
  },
}

SCSS

$custom: #3f4dbb;
$custom-light: #827ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4dbb",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 187
  },
  "hsl": {
    "h": 233.226,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.47529,
    "c": 0.17223,
    "h": 272.5
  },
  "luminance": 0.09952
}

Semantic roles & 50–950 ramp

primary

#3F4DBB

secondary

#C8C28E

accent

#C94FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F4DBB

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

Preview Lab → · Contrast checker → · Palette generator →