#3F409D#3F409D

#3F409D is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.7% C 0.148 H 277.7°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F409D
RGB	rgb(63, 64, 157)
HSL	hsl(239, 43%, 43%)
HSV	hsv(239, 60%, 62%)
CMYK	cmyk(59.9%, 59.2%, 0%, 38.4%)
CIE-LAB	lab(32.16, 28.19, -50.96)
CIE-LCH	lch(32.16, 58.24, 298.95°)
OKLab	oklab(42.66% 0.0197 -0.1463)
OKLCH	oklch(42.66% 0.148 277.7)
XYZ	xyz(9.9671, 7.1571, 32.7480)
Luminance	0.0716 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F409D #9D9C3F

analogous

#3F6F9D #3F409D #6D3F9D

triadic

#3F409D #9D3F40 #409D3F

tetradic

#3F409D #9D3F6F #9D9C3F #3F9D6D

square

#3F409D #9D3F6F #9D9C3F #3F9D6D

split-complementary

#3F409D #9D6D3F #6F9D3F

monochromatic

#1C1C46 #2D2E71 #3F409D #5C5DBD #8788CF

Accessibility & contrast

On white

8.64

#3F409D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3F409D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F409D

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F409D	#FFFFFF	#000000	##FFFFFF
##3F409D	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A0

Deuteranopia (green-blind)

#00489B

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f409d;
/* rgb */ color: rgb(63, 64, 157);
/* oklch */ color: oklch(42.7% 0.148 277.7);

Tailwind

colors: {
  custom: {
    50: '#7e75bb',
    500: '#3f409d',
    950: '#000000',
  },
}

SCSS

$custom: #3f409d;
$custom-light: #7e75bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f409d",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 157
  },
  "hsl": {
    "h": 239.362,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42655,
    "c": 0.14766,
    "h": 277.7
  },
  "luminance": 0.07158
}

Semantic roles & 50–950 ramp

primary

#3F409D

secondary

#BAB97E

accent

#D155D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F409D

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

Preview Lab → · Contrast checker → · Palette generator →