#3F51C3#3F51C3

#3F51C3 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.9% C 0.178 H 271.4°. Best body text is #FFFFFF at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F51C3
RGB	rgb(63, 81, 195)
HSL	hsl(232, 52%, 51%)
HSV	hsv(232, 68%, 76%)
CMYK	cmyk(67.7%, 58.5%, 0%, 23.5%)
CIE-LAB	lab(39.38, 30.53, -61.78)
CIE-LCH	lch(39.38, 68.92, 296.30°)
OKLab	oklab(48.93% 0.0043 -0.178)
OKLCH	oklch(48.93% 0.178 271.4)
XYZ	xyz(14.8393, 10.8804, 52.9373)
Luminance	0.1088 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F51C3 #C3B13F

analogous

#3F93C3 #3F51C3 #6F3FC3

triadic

#3F51C3 #C33F51 #51C33F

tetradic

#3F51C3 #C33F93 #C3B13F #3FC36F

square

#3F51C3 #C33F93 #C3B13F #3FC36F

split-complementary

#3F51C3 #C36F3F #93C33F

monochromatic

#202A67 #2F3D96 #3F51C3 #6E7BD2 #9CA6E0

Accessibility & contrast

On white

6.61

#3F51C3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#3F51C3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F51C3

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F51C3	#FFFFFF	#000000	##FFFFFF
##3F51C3	1.00	6.61	3.18	6.61
#FFFFFF	6.61	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C7

Deuteranopia (green-blind)

#0057C1

Tritanopia (blue-blind)

#006D82

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f51c3;
/* rgb */ color: rgb(63, 81, 195);
/* oklch */ color: oklch(48.9% 0.178 271.4);

Tailwind

colors: {
  custom: {
    50: '#8481d6',
    500: '#3f51c3',
    950: '#000000',
  },
}

SCSS

$custom: #3f51c3;
$custom-light: #8481d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f51c3",
  "rgb": {
    "r": 63,
    "g": 81,
    "b": 195
  },
  "hsl": {
    "h": 231.818,
    "s": 52.381,
    "l": 50.588
  },
  "oklch": {
    "l": 0.48929,
    "c": 0.17805,
    "h": 271.4
  },
  "luminance": 0.10882
}

Semantic roles & 50–950 ramp

primary

#3F51C3

secondary

#CCC492

accent

#C84CDC

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F51C3

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

Preview Lab → · Contrast checker → · Palette generator →