#3729BC#3729BC

#3729BC is a dark, highly saturated blue. Relative luminance 0.060; OKLCH L 41.4% C 0.215 H 275.8°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#3729BC
RGB	rgb(55, 41, 188)
HSL	hsl(246, 64%, 45%)
HSV	hsv(246, 78%, 74%)
CMYK	cmyk(70.7%, 78.2%, 0%, 26.3%)
CIE-LAB	lab(29.48, 50.84, -73.93)
CIE-LCH	lch(29.48, 89.73, 304.52°)
OKLab	oklab(41.44% 0.0216 -0.2137)
OKLCH	oklch(41.44% 0.215 275.8)
XYZ	xyz(11.4426, 6.0279, 48.1277)
Luminance	0.0603 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729BC #AEBC29

analogous

#2965BC #3729BC #8029BC

triadic

#3729BC #BC3729 #29BC37

tetradic

#3729BC #BC2965 #AEBC29 #29BC80

square

#3729BC #BC2965 #AEBC29 #29BC80

split-complementary

#3729BC #BC8029 #65BC29

monochromatic

#1A1358 #281E8A #3729BC #584BD8 #867DE3

Accessibility & contrast

On white

9.52

#3729BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#3729BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729BC

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729BC	#FFFFFF	#000000	##FFFFFF
##3729BC	1.00	9.52	2.21	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CC0

Deuteranopia (green-blind)

#003FB9

Tritanopia (blue-blind)

#005572

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3729bc;
/* rgb */ color: rgb(55, 41, 188);
/* oklch */ color: oklch(41.4% 0.215 275.8);

Tailwind

colors: {
  custom: {
    50: '#8266d2',
    500: '#3729bc',
    950: '#000000',
  },
}

SCSS

$custom: #3729bc;
$custom-light: #8266d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3729bc",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 188
  },
  "hsl": {
    "h": 245.714,
    "s": 64.192,
    "l": 44.902
  },
  "oklch": {
    "l": 0.41442,
    "c": 0.21482,
    "h": 275.8
  },
  "luminance": 0.06029
}

Semantic roles & 50–950 ramp

primary

#3729BC

secondary

#C3CB76

accent

#E741D7

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0614

muted

#7D7A83

Preview Lab

Preview with #3729BC

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

Preview Lab → · Contrast checker → · Palette generator →