#3F33A5#3F33A5

#3F33A5 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 41.1% C 0.175 H 280.2°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#3F33A5
RGB	rgb(63, 51, 165)
HSL	hsl(246, 53%, 42%)
HSV	hsv(246, 69%, 65%)
CMYK	cmyk(61.8%, 69.1%, 0%, 35.3%)
CIE-LAB	lab(29.76, 38.97, -59.71)
CIE-LCH	lch(29.76, 71.30, 303.13°)
OKLab	oklab(41.11% 0.0309 -0.1721)
OKLCH	oklch(41.11% 0.175 280.2)
XYZ	xyz(10.0231, 6.1403, 36.2470)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.83

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F33A5 #99A533

analogous

#3360A5 #3F33A5 #7833A5

triadic

#3F33A5 #A53F33 #33A53F

tetradic

#3F33A5 #A53360 #99A533 #33A578

square

#3F33A5 #A53360 #99A533 #33A578

split-complementary

#3F33A5 #A57833 #60A533

monochromatic

#1B1648 #2D2576 #3F33A5 #5A4DC8 #857CD6

Accessibility & contrast

On white

9.42

#3F33A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#3F33A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33A5

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33A5	#FFFFFF	#000000	##FFFFFF
##3F33A5	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA8

Deuteranopia (green-blind)

#0042A3

Tritanopia (blue-blind)

#005168

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3f33a5;
/* rgb */ color: rgb(63, 51, 165);
/* oklch */ color: oklch(41.1% 0.175 280.2);

Tailwind

colors: {
  custom: {
    50: '#806cc1',
    500: '#3f33a5',
    950: '#000000',
  },
}

SCSS

$custom: #3f33a5;
$custom-light: #806cc1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33a5",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 165
  },
  "hsl": {
    "h": 246.316,
    "s": 52.778,
    "l": 42.353
  },
  "oklch": {
    "l": 0.41111,
    "c": 0.17482,
    "h": 280.2
  },
  "luminance": 0.06141
}

Semantic roles & 50–950 ramp

primary

#3F33A5

secondary

#B7BF75

accent

#DC4CCD

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #3F33A5

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

Preview Lab → · Contrast checker → · Palette generator →