#3F378C#3F378C

#3F378C is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.6% C 0.136 H 282.5°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F378C
RGB	rgb(63, 55, 140)
HSL	hsl(246, 44%, 38%)
HSV	hsv(246, 61%, 55%)
CMYK	cmyk(55%, 60.7%, 0%, 45.1%)
CIE-LAB	lab(28.60, 28.24, -46.35)
CIE-LCH	lch(28.60, 54.28, 301.36°)
OKLab	oklab(39.61% 0.0294 -0.1328)
OKLCH	oklch(39.61% 0.136 282.5)
XYZ	xyz(8.1483, 5.6821, 25.4733)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F378C #848C37

analogous

#37598C #3F378C #69378C

triadic

#3F378C #8C3F37 #378C3F

tetradic

#3F378C #8C3759 #848C37 #378C69

square

#3F378C #8C3759 #848C37 #378C69

split-complementary

#3F378C #8C6937 #598C37

monochromatic

#171434 #2B2660 #3F378C #5349B7 #7D75C9

Accessibility & contrast

On white

9.83

#3F378C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#3F378C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F378C

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F378C	#FFFFFF	#000000	##FFFFFF
##3F378C	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468F

Deuteranopia (green-blind)

#00408A

Tritanopia (blue-blind)

#1D4B5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3f378c;
/* rgb */ color: rgb(63, 55, 140);
/* oklch */ color: oklch(39.6% 0.136 282.5);

Tailwind

colors: {
  custom: {
    50: '#7b6eae',
    500: '#3f378c',
    950: '#000000',
  },
}

SCSS

$custom: #3f378c;
$custom-light: #7b6eae;
$custom-dark: #000000;

JSON

{
  "hex": "#3f378c",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 140
  },
  "hsl": {
    "h": 245.647,
    "s": 43.59,
    "l": 38.235
  },
  "oklch": {
    "l": 0.39608,
    "c": 0.13605,
    "h": 282.5
  },
  "luminance": 0.05683
}

Semantic roles & 50–950 ramp

primary

#3F378C

secondary

#ABB16D

accent

#D354C7

background

#F7F6FA

surface

#EEECF4

border

#C9C7CE

text

#0A0710

muted

#7C7A7F

Preview Lab

Preview with #3F378C

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

Preview Lab → · Contrast checker → · Palette generator →