#3A378D#3A378D

#3A378D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.3% C 0.138 H 279.5°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#3A378D
RGB	rgb(58, 55, 141)
HSL	hsl(242, 44%, 38%)
HSV	hsv(242, 61%, 55%)
CMYK	cmyk(58.9%, 61%, 0%, 44.7%)
CIE-LAB	lab(28.26, 27.59, -47.53)
CIE-LCH	lch(28.26, 54.96, 300.14°)
OKLab	oklab(39.28% 0.0228 -0.1365)
OKLCH	oklch(39.28% 0.138 279.5)
XYZ	xyz(7.9173, 5.5545, 25.8491)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3A378D #8A8D37

analogous

#375F8D #3A378D #65378D

triadic

#3A378D #8D3A37 #378D3A

tetradic

#3A378D #8D375F #8A8D37 #378D65

square

#3A378D #8D375F #8A8D37 #378D65

split-complementary

#3A378D #8D6537 #5F8D37

monochromatic

#161535 #282661 #3A378D #4D49B8 #7875C9

Accessibility & contrast

On white

9.95

#3A378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#3A378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3A378D

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A378D	#FFFFFF	#000000	##FFFFFF
##3A378D	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004690

Deuteranopia (green-blind)

#003F8B

Tritanopia (blue-blind)

#084C5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3a378d;
/* rgb */ color: rgb(58, 55, 141);
/* oklch */ color: oklch(39.3% 0.138 279.5);

Tailwind

colors: {
  custom: {
    50: '#796eaf',
    500: '#3a378d',
    950: '#000000',
  },
}

SCSS

$custom: #3a378d;
$custom-light: #796eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#3a378d",
  "rgb": {
    "r": 58,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 242.093,
    "s": 43.878,
    "l": 38.431
  },
  "oklch": {
    "l": 0.39281,
    "c": 0.13835,
    "h": 279.5
  },
  "luminance": 0.05555
}

Semantic roles & 50–950 ramp

primary

#3A378D

secondary

#B0B26E

accent

#D454CF

background

#F7F6FA

surface

#EEEBF5

border

#C9C6CF

text

#0A0710

muted

#7C7A7F

Preview Lab

Preview with #3A378D

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

Preview Lab → · Contrast checker → · Palette generator →