#3729B8#3729B8

#3729B8 is a dark, highly saturated blue. Relative luminance 0.059; OKLCH L 41.0% C 0.210 H 276.2°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#3729B8
RGB	rgb(55, 41, 184)
HSL	hsl(246, 64%, 44%)
HSV	hsv(246, 78%, 72%)
CMYK	cmyk(70.1%, 77.7%, 0%, 27.8%)
CIE-LAB	lab(29.05, 49.61, -72.28)
CIE-LCH	lch(29.05, 87.66, 304.46°)
OKLab	oklab(41.01% 0.0225 -0.2089)
OKLCH	oklch(41.01% 0.21 276.2)
XYZ	xyz(11.0174, 5.8578, 45.8882)
Luminance	0.0586 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729B8 #AAB829

analogous

#2963B8 #3729B8 #7F29B8

triadic

#3729B8 #B83729 #29B837

tetradic

#3729B8 #B82963 #AAB829 #29B87F

square

#3729B8 #B82963 #AAB829 #29B87F

split-complementary

#3729B8 #B87F29 #63B829

monochromatic

#191354 #281E86 #3729B8 #5648D6 #847AE1

Accessibility & contrast

On white

9.67

#3729B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#3729B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B8

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729B8	#FFFFFF	#000000	##FFFFFF
##3729B8	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004ABC

Deuteranopia (green-blind)

#003EB5

Tritanopia (blue-blind)

#005470

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3729b8;
/* rgb */ color: rgb(55, 41, 184);
/* oklch */ color: oklch(41.0% 0.210 276.2);

Tailwind

colors: {
  custom: {
    50: '#8166cf',
    500: '#3729b8',
    950: '#000000',
  },
}

SCSS

$custom: #3729b8;
$custom-light: #8166cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3729b8",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 184
  },
  "hsl": {
    "h": 245.874,
    "s": 63.556,
    "l": 44.118
  },
  "oklch": {
    "l": 0.41013,
    "c": 0.21014,
    "h": 276.2
  },
  "luminance": 0.05859
}

Semantic roles & 50–950 ramp

primary

#3729B8

secondary

#C1C973

accent

#E741D6

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #3729B8

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

Preview Lab → · Contrast checker → · Palette generator →