#373AA3#373AA3

#373AA3 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.5% C 0.166 H 275.2°. Best body text is #FFFFFF at 9.14:1 contrast (WCAG AA passes).

Color values

HEX	#373AA3
RGB	rgb(55, 58, 163)
HSL	hsl(238, 50%, 43%)
HSV	hsv(238, 66%, 64%)
CMYK	cmyk(66.3%, 64.4%, 0%, 36.1%)
CIE-LAB	lab(30.60, 32.79, -57.16)
CIE-LCH	lch(30.60, 65.90, 299.84°)
OKLab	oklab(41.51% 0.0151 -0.1648)
OKLCH	oklch(41.51% 0.166 275.2)
XYZ	xyz(9.6973, 6.4818, 35.3833)
Luminance	0.0648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.48

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373AA3 #A3A037

analogous

#3770A3 #373AA3 #6A37A3

triadic

#373AA3 #A3373A #3AA337

tetradic

#373AA3 #A33770 #A3A037 #37A36A

square

#373AA3 #A33770 #A3A037 #37A36A

split-complementary

#373AA3 #A36A37 #70A337

monochromatic

#181947 #282A75 #373AA3 #5256C5 #8083D4

Accessibility & contrast

On white

9.14

#373AA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#373AA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AA3

9.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AA3	#FFFFFF	#000000	##FFFFFF
##373AA3	1.00	9.14	2.30	9.14
#FFFFFF	9.14	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA6

Deuteranopia (green-blind)

#0043A1

Tritanopia (blue-blind)

#005569

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #373aa3;
/* rgb */ color: rgb(55, 58, 163);
/* oklch */ color: oklch(41.5% 0.166 275.2);

Tailwind

colors: {
  custom: {
    50: '#7b70bf',
    500: '#373aa3',
    950: '#000000',
  },
}

SCSS

$custom: #373aa3;
$custom-light: #7b70bf;
$custom-dark: #000000;

JSON

{
  "hex": "#373aa3",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 163
  },
  "hsl": {
    "h": 238.333,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.41508,
    "c": 0.16552,
    "h": 275.2
  },
  "luminance": 0.06483
}

Semantic roles & 50–950 ramp

primary

#373AA3

secondary

#BEBC78

accent

#D54FD9

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #373AA3

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

Preview Lab → · Contrast checker → · Palette generator →