#3733A1#3733A1

#3733A1 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.1% C 0.171 H 277.0°. Best body text is #FFFFFF at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#3733A1
RGB	rgb(55, 51, 161)
HSL	hsl(242, 52%, 42%)
HSV	hsv(242, 68%, 63%)
CMYK	cmyk(65.8%, 68.3%, 0%, 36.9%)
CIE-LAB	lab(28.78, 36.48, -58.93)
CIE-LCH	lch(28.78, 69.31, 301.76°)
OKLab	oklab(40.13% 0.0208 -0.17)
OKLCH	oklch(40.13% 0.171 277)
XYZ	xyz(9.1903, 5.7523, 34.3373)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733A1 #9DA133

analogous

#3366A1 #3733A1 #6E33A1

triadic

#3733A1 #A13733 #33A137

tetradic

#3733A1 #A13366 #9DA133 #33A16E

square

#3733A1 #A13366 #9DA133 #33A16E

split-complementary

#3733A1 #A16E33 #66A133

monochromatic

#171644 #272473 #3733A1 #504BC6 #7D7AD5

Accessibility & contrast

On white

9.76

#3733A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#3733A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733A1

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733A1	#FFFFFF	#000000	##FFFFFF
##3733A1	1.00	9.76	2.15	9.76
#FFFFFF	9.76	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A4

Deuteranopia (green-blind)

#003F9F

Tritanopia (blue-blind)

#005065

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3733a1;
/* rgb */ color: rgb(55, 51, 161);
/* oklch */ color: oklch(40.1% 0.171 277.0);

Tailwind

colors: {
  custom: {
    50: '#7b6bbe',
    500: '#3733a1',
    950: '#000000',
  },
}

SCSS

$custom: #3733a1;
$custom-light: #7b6bbe;
$custom-dark: #000000;

JSON

{
  "hex": "#3733a1",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 161
  },
  "hsl": {
    "h": 242.182,
    "s": 51.887,
    "l": 41.569
  },
  "oklch": {
    "l": 0.40131,
    "c": 0.1713,
    "h": 277
  },
  "luminance": 0.05753
}

Semantic roles & 50–950 ramp

primary

#3733A1

secondary

#BBBD72

accent

#DB4CD6

background

#F8F6FB

surface

#EFEBF7

border

#CAC6D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #3733A1

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

Preview Lab → · Contrast checker → · Palette generator →