#3F4CB3#3F4CB3

#3F4CB3 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.7% C 0.163 H 273.0°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F4CB3
RGB	rgb(63, 76, 179)
HSL	hsl(233, 48%, 47%)
HSV	hsv(233, 65%, 70%)
CMYK	cmyk(64.8%, 57.5%, 0%, 29.8%)
CIE-LAB	lab(36.89, 28.10, -56.44)
CIE-LCH	lch(36.89, 63.05, 296.46°)
OKLab	oklab(46.7% 0.0084 -0.1623)
OKLCH	oklch(46.7% 0.163 273)
XYZ	xyz(12.7683, 9.4792, 43.7959)
Luminance	0.0948 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4CB3 #B3A63F

analogous

#3F86B3 #3F4CB3 #6C3FB3

triadic

#3F4CB3 #B33F4C #4CB33F

tetradic

#3F4CB3 #B33F86 #B3A63F #3FB36C

square

#3F4CB3 #B33F86 #B3A63F #3FB36C

split-complementary

#3F4CB3 #B36C3F #86B33F

monochromatic

#1F2658 #2F3986 #3F4CB3 #6671C9 #939BD9

Accessibility & contrast

On white

7.25

#3F4CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3F4CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4CB3

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4CB3	#FFFFFF	#000000	##FFFFFF
##3F4CB3	1.00	7.25	2.90	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB6

Deuteranopia (green-blind)

#0052B1

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4cb3;
/* rgb */ color: rgb(63, 76, 179);
/* oklch */ color: oklch(46.7% 0.163 273.0);

Tailwind

colors: {
  custom: {
    50: '#817eca',
    500: '#3f4cb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f4cb3;
$custom-light: #817eca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4cb3",
  "rgb": {
    "r": 63,
    "g": 76,
    "b": 179
  },
  "hsl": {
    "h": 233.276,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.46695,
    "c": 0.16257,
    "h": 273
  },
  "luminance": 0.0948
}

Semantic roles & 50–950 ramp

primary

#3F4CB3

secondary

#C4BE89

accent

#C850D8

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4CB3

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

Preview Lab → · Contrast checker → · Palette generator →