#3F397B#3F397B

#3F397B is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.7% C 0.108 H 284.2°. Best body text is #FFFFFF at 10.08:1 contrast (WCAG AA passes).

Color values

HEX	#3F397B
RGB	rgb(63, 57, 123)
HSL	hsl(245, 37%, 35%)
HSV	hsv(245, 54%, 48%)
CMYK	cmyk(48.8%, 53.7%, 0%, 51.8%)
CIE-LAB	lab(27.88, 21.31, -36.90)
CIE-LCH	lch(27.88, 42.61, 300.01°)
OKLab	oklab(38.68% 0.0267 -0.105)
OKLCH	oklch(38.68% 0.108 284.2)
XYZ	xyz(7.0871, 5.4127, 19.4064)
Luminance	0.0541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F397B #757B39

analogous

#39547B #3F397B #60397B

triadic

#3F397B #7B3F39 #397B3F

tetradic

#3F397B #7B3954 #757B39 #397B60

square

#3F397B #7B3954 #757B39 #397B60

split-complementary

#3F397B #7B6039 #547B39

monochromatic

#141227 #2A2651 #3F397B #544CA5 #7871BD

Accessibility & contrast

On white

10.08

#3F397B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#3F397B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F397B

10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F397B	#FFFFFF	#000000	##FFFFFF
##3F397B	1.00	10.08	2.08	10.08
#FFFFFF	10.08	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A447D

Deuteranopia (green-blind)

#17407A

Tritanopia (blue-blind)

#2B4754

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3f397b;
/* rgb */ color: rgb(63, 57, 123);
/* oklch */ color: oklch(38.7% 0.108 284.2);

Tailwind

colors: {
  custom: {
    50: '#786fa2',
    500: '#3f397b',
    950: '#000000',
  },
}

SCSS

$custom: #3f397b;
$custom-light: #786fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f397b",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 123
  },
  "hsl": {
    "h": 245.455,
    "s": 36.667,
    "l": 35.294
  },
  "oklch": {
    "l": 0.38684,
    "c": 0.10836,
    "h": 284.2
  },
  "luminance": 0.05413
}

Semantic roles & 50–950 ramp

primary

#3F397B

secondary

#A1A669

accent

#CD5BC2

background

#F7F6FA

surface

#EEECF3

border

#C9C7CD

text

#09070F

muted

#7B7A7F

Preview Lab

Preview with #3F397B

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

Preview Lab → · Contrast checker → · Palette generator →