#3F439D#3F439D

#3F439D is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.2% C 0.144 H 276.6°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#3F439D
RGB	rgb(63, 67, 157)
HSL	hsl(237, 43%, 43%)
HSV	hsv(237, 60%, 62%)
CMYK	cmyk(59.9%, 57.3%, 0%, 38.4%)
CIE-LAB	lab(32.93, 26.24, -49.72)
CIE-LCH	lch(32.93, 56.22, 297.83°)
OKLab	oklab(43.22% 0.0166 -0.1427)
OKLCH	oklch(43.22% 0.144 276.6)
XYZ	xyz(10.1409, 7.5046, 32.8059)
Luminance	0.0751 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F439D #9D993F

analogous

#3F729D #3F439D #6A3F9D

triadic

#3F439D #9D3F43 #439D3F

tetradic

#3F439D #9D3F72 #9D993F #3F9D6A

square

#3F439D #9D3F72 #9D993F #3F9D6A

split-complementary

#3F439D #9D6A3F #729D3F

monochromatic

#1C1E46 #2D3071 #3F439D #5C60BD #878ACF

Accessibility & contrast

On white

8.40

#3F439D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#3F439D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F439D

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F439D	#FFFFFF	#000000	##FFFFFF
##3F439D	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A0

Deuteranopia (green-blind)

#004A9B

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f439d;
/* rgb */ color: rgb(63, 67, 157);
/* oklch */ color: oklch(43.2% 0.144 276.6);

Tailwind

colors: {
  custom: {
    50: '#7d77bb',
    500: '#3f439d',
    950: '#000000',
  },
}

SCSS

$custom: #3f439d;
$custom-light: #7d77bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f439d",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 157
  },
  "hsl": {
    "h": 237.447,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.43224,
    "c": 0.14362,
    "h": 276.6
  },
  "luminance": 0.07505
}

Semantic roles & 50–950 ramp

primary

#3F439D

secondary

#BAB77E

accent

#CD55D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F439D

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

Preview Lab → · Contrast checker → · Palette generator →