#3737AE#3737AE

#3737AE is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.0% C 0.184 H 275.1°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#3737AE
RGB	rgb(55, 55, 174)
HSL	hsl(240, 52%, 45%)
HSV	hsv(240, 68%, 68%)
CMYK	cmyk(68.4%, 68.4%, 0%, 31.8%)
CIE-LAB	lab(30.88, 38.46, -63.31)
CIE-LCH	lch(30.88, 74.07, 301.28°)
OKLab	oklab(42.01% 0.0163 -0.1829)
OKLCH	oklch(42.01% 0.184 275.1)
XYZ	xyz(10.5792, 6.5996, 40.7525)
Luminance	0.0660 (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

#3737AE #AEAE37

analogous

#3773AE #3737AE #7337AE

triadic

#3737AE #AE3737 #37AE37

tetradic

#3737AE #AE3773 #AEAE37 #37AE73

square

#3737AE #AE3773 #AEAE37 #37AE73

split-complementary

#3737AE #AE7337 #73AE37

monochromatic

#1A1A51 #28287F #3737AE #5858CA #8686D9

Accessibility & contrast

On white

9.05

#3737AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3737AE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737AE

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737AE	#FFFFFF	#000000	##FFFFFF
##3737AE	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB2

Deuteranopia (green-blind)

#0043AC

Tritanopia (blue-blind)

#00576E

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3737ae;
/* rgb */ color: rgb(55, 55, 174);
/* oklch */ color: oklch(42.0% 0.184 275.1);

Tailwind

colors: {
  custom: {
    50: '#7e6ec7',
    500: '#3737ae',
    950: '#000000',
  },
}

SCSS

$custom: #3737ae;
$custom-light: #7e6ec7;
$custom-dark: #000000;

JSON

{
  "hex": "#3737ae",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 174
  },
  "hsl": {
    "h": 240,
    "s": 51.965,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42013,
    "c": 0.18357,
    "h": 275.1
  },
  "luminance": 0.06601
}

Semantic roles & 50–950 ramp

primary

#3737AE

secondary

#C3C37E

accent

#DB4CDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3737AE

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

Preview Lab → · Contrast checker → · Palette generator →