#3F31A7#3F31A7

#3F31A7 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 41.0% C 0.180 H 280.3°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#3F31A7
RGB	rgb(63, 49, 167)
HSL	hsl(247, 55%, 42%)
HSV	hsv(247, 71%, 65%)
CMYK	cmyk(62.3%, 70.7%, 0%, 34.5%)
CIE-LAB	lab(29.52, 40.79, -61.31)
CIE-LCH	lch(29.52, 73.64, 303.63°)
OKLab	oklab(40.99% 0.0321 -0.1768)
OKLCH	oklch(40.99% 0.18 280.3)
XYZ	xyz(10.1211, 6.0427, 37.1847)
Luminance	0.0604 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F31A7 #99A731

analogous

#315EA7 #3F31A7 #7A31A7

triadic

#3F31A7 #A73F31 #31A73F

tetradic

#3F31A7 #A7315E #99A731 #31A77A

square

#3F31A7 #A7315E #99A731 #31A77A

split-complementary

#3F31A7 #A77A31 #5EA731

monochromatic

#1B1548 #2D2378 #3F31A7 #5A4BCA #857AD8

Accessibility & contrast

On white

9.51

#3F31A7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#3F31A7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31A7

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F31A7	#FFFFFF	#000000	##FFFFFF
##3F31A7	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AAB

Deuteranopia (green-blind)

#0041A5

Tritanopia (blue-blind)

#005168

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3f31a7;
/* rgb */ color: rgb(63, 49, 167);
/* oklch */ color: oklch(41.0% 0.180 280.3);

Tailwind

colors: {
  custom: {
    50: '#816bc2',
    500: '#3f31a7',
    950: '#000000',
  },
}

SCSS

$custom: #3f31a7;
$custom-light: #816bc2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f31a7",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 167
  },
  "hsl": {
    "h": 247.119,
    "s": 54.63,
    "l": 42.353
  },
  "oklch": {
    "l": 0.40992,
    "c": 0.17967,
    "h": 280.3
  },
  "luminance": 0.06043
}

Semantic roles & 50–950 ramp

primary

#3F31A7

secondary

#B7C173

accent

#DE4ACC

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3F31A7

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

Preview Lab → · Contrast checker → · Palette generator →