#3F50BE#3F50BE

#3F50BE is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.3% C 0.173 H 271.7°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F50BE
RGB	rgb(63, 80, 190)
HSL	hsl(232, 50%, 50%)
HSV	hsv(232, 67%, 75%)
CMYK	cmyk(66.8%, 57.9%, 0%, 25.5%)
CIE-LAB	lab(38.74, 29.41, -59.90)
CIE-LCH	lch(38.74, 66.73, 296.15°)
OKLab	oklab(48.34% 0.0051 -0.1725)
OKLCH	oklch(48.34% 0.173 271.7)
XYZ	xyz(14.2097, 10.5105, 49.9851)
Luminance	0.1051 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50BE #BEAD3F

analogous

#3F8FBE #3F50BE #6E3FBE

triadic

#3F50BE #BE3F50 #50BE3F

tetradic

#3F50BE #BE3F8F #BEAD3F #3FBE6E

square

#3F50BE #BE3F8F #BEAD3F #3FBE6E

split-complementary

#3F50BE #BE6E3F #8FBE3F

monochromatic

#212962 #303D90 #3F50BE #6C79CE #9AA3DD

Accessibility & contrast

On white

6.77

#3F50BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#3F50BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50BE

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50BE	#FFFFFF	#000000	##FFFFFF
##3F50BE	1.00	6.77	3.10	6.77
#FFFFFF	6.77	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C2

Deuteranopia (green-blind)

#0056BC

Tritanopia (blue-blind)

#006B7F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f50be;
/* rgb */ color: rgb(63, 80, 190);
/* oklch */ color: oklch(48.3% 0.173 271.7);

Tailwind

colors: {
  custom: {
    50: '#8381d2',
    500: '#3f50be',
    950: '#000000',
  },
}

SCSS

$custom: #3f50be;
$custom-light: #8381d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50be",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 190
  },
  "hsl": {
    "h": 231.969,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.48336,
    "c": 0.17254,
    "h": 271.7
  },
  "luminance": 0.10512
}

Semantic roles & 50–950 ramp

primary

#3F50BE

secondary

#C9C28F

accent

#C74EDA

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F50BE

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

Preview Lab → · Contrast checker → · Palette generator →