#3F4DB3#3F4DB3

#3F4DB3 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.9% C 0.161 H 272.7°. Best body text is #FFFFFF at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DB3
RGB	rgb(63, 77, 179)
HSL	hsl(233, 48%, 47%)
HSV	hsv(233, 65%, 70%)
CMYK	cmyk(64.8%, 57%, 0%, 29.8%)
CIE-LAB	lab(37.15, 27.45, -56.03)
CIE-LCH	lch(37.15, 62.39, 296.10°)
OKLab	oklab(46.89% 0.0075 -0.1611)
OKLCH	oklch(46.89% 0.161 272.7)
XYZ	xyz(12.8377, 9.6181, 43.8190)
Luminance	0.0962 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DB3 #B3A53F

analogous

#3F87B3 #3F4DB3 #6B3FB3

triadic

#3F4DB3 #B33F4D #4DB33F

tetradic

#3F4DB3 #B33F87 #B3A53F #3FB36B

square

#3F4DB3 #B33F87 #B3A53F #3FB36B

split-complementary

#3F4DB3 #B36B3F #87B33F

monochromatic

#1F2658 #2F3A86 #3F4DB3 #6672C9 #939CD9

Accessibility & contrast

On white

7.18

#3F4DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#3F4DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4DB3

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DB3	#FFFFFF	#000000	##FFFFFF
##3F4DB3	1.00	7.18	2.92	7.18
#FFFFFF	7.18	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB6

Deuteranopia (green-blind)

#0052B1

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4db3;
/* rgb */ color: rgb(63, 77, 179);
/* oklch */ color: oklch(46.9% 0.161 272.7);

Tailwind

colors: {
  custom: {
    50: '#817eca',
    500: '#3f4db3',
    950: '#000000',
  },
}

SCSS

$custom: #3f4db3;
$custom-light: #817eca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4db3",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 179
  },
  "hsl": {
    "h": 232.759,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.46886,
    "c": 0.16128,
    "h": 272.7
  },
  "luminance": 0.09619
}

Semantic roles & 50–950 ramp

primary

#3F4DB3

secondary

#C4BD89

accent

#C750D8

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F4DB3

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

Preview Lab → · Contrast checker → · Palette generator →