#3F51CD#3F51CD

#3F51CD is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.8% C 0.191 H 271.3°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#3F51CD
RGB	rgb(63, 81, 205)
HSL	hsl(232, 59%, 53%)
HSV	hsv(232, 69%, 80%)
CMYK	cmyk(69.3%, 60.5%, 0%, 19.6%)
CIE-LAB	lab(40.16, 34.05, -66.31)
CIE-LCH	lch(40.16, 74.54, 297.18°)
OKLab	oklab(49.75% 0.0042 -0.1913)
OKLCH	oklch(49.75% 0.191 271.3)
XYZ	xyz(16.0080, 11.3478, 59.0925)
Luminance	0.1135 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F51CD #CDBB3F

analogous

#3F98CD #3F51CD #743FCD

triadic

#3F51CD #CD3F51 #51CD3F

tetradic

#3F51CD #CD3F98 #CDBB3F #3FCD74

square

#3F51CD #CD3F98 #CDBB3F #3FCD74

split-complementary

#3F51CD #CD743F #98CD3F

monochromatic

#1E2974 #2B3AA4 #3F51CD #707DDA #A0A9E6

Accessibility & contrast

On white

6.42

#3F51CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#3F51CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F51CD

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F51CD	#FFFFFF	#000000	##FFFFFF
##3F51CD	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065D1

Deuteranopia (green-blind)

#0058CB

Tritanopia (blue-blind)

#007087

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f51cd;
/* rgb */ color: rgb(63, 81, 205);
/* oklch */ color: oklch(49.8% 0.191 271.3);

Tailwind

colors: {
  custom: {
    50: '#8681dd',
    500: '#3f51cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f51cd;
$custom-light: #8681dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f51cd",
  "rgb": {
    "r": 63,
    "g": 81,
    "b": 205
  },
  "hsl": {
    "h": 232.394,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.49754,
    "c": 0.19134,
    "h": 271.3
  },
  "luminance": 0.11349
}

Semantic roles & 50–950 ramp

primary

#3F51CD

secondary

#D3CB95

accent

#CE46E2

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #3F51CD

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

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