#3F33BB#3F33BB

#3F33BB is a dark, highly saturated blue. Relative luminance 0.070; OKLCH L 43.2% C 0.202 H 277.7°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F33BB
RGB	rgb(63, 51, 187)
HSL	hsl(245, 57%, 47%)
HSV	hsv(245, 73%, 73%)
CMYK	cmyk(66.3%, 72.7%, 0%, 26.7%)
CIE-LAB	lab(31.83, 46.05, -69.44)
CIE-LCH	lch(31.83, 83.32, 303.55°)
OKLab	oklab(43.22% 0.027 -0.2005)
OKLCH	oklch(43.22% 0.202 277.7)
XYZ	xyz(12.2005, 7.0112, 47.7144)
Luminance	0.0701 (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

#3F33BB #AFBB33

analogous

#336BBB #3F33BB #8333BB

triadic

#3F33BB #BB3F33 #33BB3F

tetradic

#3F33BB #BB336B #AFBB33 #33BB83

square

#3F33BB #BB336B #AFBB33 #33BB83

split-complementary

#3F33BB #BB8333 #6BBB33

monochromatic

#1F195B #2F268B #3F33BB #6459D2 #9189DF

Accessibility & contrast

On white

8.74

#3F33BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3F33BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33BB

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33BB	#FFFFFF	#000000	##FFFFFF
##3F33BB	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050BF

Deuteranopia (green-blind)

#0045B9

Tritanopia (blue-blind)

#005974

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3f33bb;
/* rgb */ color: rgb(63, 51, 187);
/* oklch */ color: oklch(43.2% 0.202 277.7);

Tailwind

colors: {
  custom: {
    50: '#846dd1',
    500: '#3f33bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f33bb;
$custom-light: #846dd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33bb",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 187
  },
  "hsl": {
    "h": 245.294,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43219,
    "c": 0.20236,
    "h": 277.7
  },
  "luminance": 0.07012
}

Semantic roles & 50–950 ramp

primary

#3F33BB

secondary

#C3C981

accent

#E047D3

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3F33BB

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

Preview Lab → · Contrast checker → · Palette generator →