#3F51AE#3F51AE

#3F51AE is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.3% C 0.149 H 271.3°. Best body text is #FFFFFF at 7.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F51AE
RGB	rgb(63, 81, 174)
HSL	hsl(230, 47%, 46%)
HSV	hsv(230, 64%, 68%)
CMYK	cmyk(63.8%, 53.4%, 0%, 31.8%)
CIE-LAB	lab(37.84, 23.09, -51.95)
CIE-LCH	lch(37.84, 56.86, 293.96°)
OKLab	oklab(47.29% 0.0035 -0.1491)
OKLCH	oklch(47.29% 0.149 271.3)
XYZ	xyz(12.6297, 9.9965, 41.3001)
Luminance	0.1000 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F51AE #AE9C3F

analogous

#3F89AE #3F51AE #653FAE

triadic

#3F51AE #AE3F51 #51AE3F

tetradic

#3F51AE #AE3F89 #AE9C3F #3FAE65

square

#3F51AE #AE3F89 #AE9C3F #3FAE65

split-complementary

#3F51AE #AE653F #89AE3F

monochromatic

#1E2754 #2F3C81 #3F51AE #6474C7 #909CD7

Accessibility & contrast

On white

7.00

#3F51AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

3.00

#3F51AE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F51AE

7.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F51AE	#FFFFFF	#000000	##FFFFFF
##3F51AE	1.00	7.00	3.00	7.00
#FFFFFF	7.00	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	7.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#155EB1

Deuteranopia (green-blind)

#0054AC

Tritanopia (blue-blind)

#006777

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f51ae;
/* rgb */ color: rgb(63, 81, 174);
/* oklch */ color: oklch(47.3% 0.149 271.3);

Tailwind

colors: {
  custom: {
    50: '#8081c7',
    500: '#3f51ae',
    950: '#000000',
  },
}

SCSS

$custom: #3f51ae;
$custom-light: #8081c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f51ae",
  "rgb": {
    "r": 63,
    "g": 81,
    "b": 174
  },
  "hsl": {
    "h": 230.27,
    "s": 46.835,
    "l": 46.471
  },
  "oklch": {
    "l": 0.47288,
    "c": 0.14912,
    "h": 271.3
  },
  "luminance": 0.09998
}

Semantic roles & 50–950 ramp

primary

#3F51AE

secondary

#C2B887

accent

#C151D6

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F51AE

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

Preview Lab → · Contrast checker → · Palette generator →