#3F4BB4#3F4BB4

#3F4BB4 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.6% C 0.165 H 273.2°. Best body text is #FFFFFF at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BB4
RGB	rgb(63, 75, 180)
HSL	hsl(234, 48%, 48%)
HSV	hsv(234, 65%, 71%)
CMYK	cmyk(65%, 58.3%, 0%, 29.4%)
CIE-LAB	lab(36.71, 29.09, -57.33)
CIE-LCH	lch(36.71, 64.28, 296.91°)
OKLab	oklab(46.59% 0.0093 -0.165)
OKLCH	oklch(46.59% 0.165 273.2)
XYZ	xyz(12.8015, 9.3831, 44.3077)
Luminance	0.0938 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BB4 #B4A83F

analogous

#3F86B4 #3F4BB4 #6D3FB4

triadic

#3F4BB4 #B43F4B #4BB43F

tetradic

#3F4BB4 #B43F86 #B4A83F #3FB46D

square

#3F4BB4 #B43F86 #B4A83F #3FB46D

split-complementary

#3F4BB4 #B46D3F #86B43F

monochromatic

#1F2559 #2F3887 #3F4BB4 #6771CA #949BDA

Accessibility & contrast

On white

7.30

#3F4BB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F4BB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BB4

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BB4	#FFFFFF	#000000	##FFFFFF
##3F4BB4	1.00	7.30	2.88	7.30
#FFFFFF	7.30	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB8

Deuteranopia (green-blind)

#0051B2

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f4bb4;
/* rgb */ color: rgb(63, 75, 180);
/* oklch */ color: oklch(46.6% 0.165 273.2);

Tailwind

colors: {
  custom: {
    50: '#817dcb',
    500: '#3f4bb4',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bb4;
$custom-light: #817dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bb4",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 180
  },
  "hsl": {
    "h": 233.846,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.46585,
    "c": 0.16521,
    "h": 273.2
  },
  "luminance": 0.09384
}

Semantic roles & 50–950 ramp

primary

#3F4BB4

secondary

#C5BF8A

accent

#CA50D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4BB4

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

Preview Lab → · Contrast checker → · Palette generator →