#3F50BF#3F50BF

#3F50BF is a mid, vivid blue. Relative luminance 0.106; OKLCH L 48.4% C 0.174 H 271.7°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F50BF
RGB	rgb(63, 80, 191)
HSL	hsl(232, 50%, 50%)
HSV	hsv(232, 67%, 75%)
CMYK	cmyk(67%, 58.1%, 0%, 25.1%)
CIE-LAB	lab(38.82, 29.76, -60.36)
CIE-LCH	lch(38.82, 67.30, 296.25°)
OKLab	oklab(48.42% 0.0051 -0.1738)
OKLCH	oklch(48.42% 0.174 271.7)
XYZ	xyz(14.3194, 10.5543, 50.5627)
Luminance	0.1056 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50BF #BFAE3F

analogous

#3F90BF #3F50BF #6E3FBF

triadic

#3F50BF #BF3F50 #50BF3F

tetradic

#3F50BF #BF3F90 #BFAE3F #3FBF6E

square

#3F50BF #BF3F90 #BFAE3F #3FBF6E

split-complementary

#3F50BF #BF6E3F #90BF3F

monochromatic

#212963 #303D91 #3F50BF #6D7ACF #9BA3DE

Accessibility & contrast

On white

6.75

#3F50BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3F50BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50BF

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50BF	#FFFFFF	#000000	##FFFFFF
##3F50BF	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C3

Deuteranopia (green-blind)

#0056BD

Tritanopia (blue-blind)

#006B7F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f50bf;
/* rgb */ color: rgb(63, 80, 191);
/* oklch */ color: oklch(48.4% 0.174 271.7);

Tailwind

colors: {
  custom: {
    50: '#8381d3',
    500: '#3f50bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f50bf;
$custom-light: #8381d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50bf",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 191
  },
  "hsl": {
    "h": 232.031,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.48417,
    "c": 0.17389,
    "h": 271.7
  },
  "luminance": 0.10556
}

Semantic roles & 50–950 ramp

primary

#3F50BF

secondary

#CAC290

accent

#C74EDA

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F50BF

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

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