#3733BF#3733BF

#3733BF is a dark, highly saturated blue. Relative luminance 0.069; OKLCH L 43.1% C 0.209 H 274.4°. Best body text is #FFFFFF at 8.79:1 contrast (WCAG AA passes).

Color values

HEX	#3733BF
RGB	rgb(55, 51, 191)
HSL	hsl(242, 58%, 47%)
HSV	hsv(242, 73%, 75%)
CMYK	cmyk(71.2%, 73.3%, 0%, 25.1%)
CIE-LAB	lab(31.67, 46.47, -72.09)
CIE-LCH	lch(31.67, 85.77, 302.81°)
OKLab	oklab(43.08% 0.016 -0.2085)
OKLCH	oklch(43.08% 0.209 274.4)
XYZ	xyz(12.1602, 6.9403, 49.9789)
Luminance	0.0694 (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

#3733BF #BBBF33

analogous

#3375BF #3733BF #7D33BF

triadic

#3733BF #BF3733 #33BF37

tetradic

#3733BF #BF3375 #BBBF33 #33BF7D

square

#3733BF #BF3375 #BBBF33 #33BF7D

split-complementary

#3733BF #BF7D33 #75BF33

monochromatic

#1B195E #29268F #3733BF #5F5CD3 #8E8CE0

Accessibility & contrast

On white

8.79

#3733BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#3733BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733BF

8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733BF	#FFFFFF	#000000	##FFFFFF
##3733BF	1.00	8.79	2.39	8.79
#FFFFFF	8.79	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051C3

Deuteranopia (green-blind)

#0044BC

Tritanopia (blue-blind)

#005B76

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3733bf;
/* rgb */ color: rgb(55, 51, 191);
/* oklch */ color: oklch(43.1% 0.209 274.4);

Tailwind

colors: {
  custom: {
    50: '#826cd4',
    500: '#3733bf',
    950: '#000000',
  },
}

SCSS

$custom: #3733bf;
$custom-light: #826cd4;
$custom-dark: #000000;

JSON

{
  "hex": "#3733bf",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 191
  },
  "hsl": {
    "h": 241.714,
    "s": 57.851,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43078,
    "c": 0.20909,
    "h": 274.4
  },
  "luminance": 0.06941
}

Semantic roles & 50–950 ramp

primary

#3733BF

secondary

#C9CB83

accent

#E147DD

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3733BF

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

Preview Lab → · Contrast checker → · Palette generator →