#3F439E#3F439E

#3F439E is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.3% C 0.145 H 276.6°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#3F439E
RGB	rgb(63, 67, 158)
HSL	hsl(237, 43%, 43%)
HSV	hsv(237, 60%, 62%)
CMYK	cmyk(60.1%, 57.6%, 0%, 38%)
CIE-LAB	lab(33.00, 26.59, -50.20)
CIE-LCH	lch(33.00, 56.81, 297.91°)
OKLab	oklab(43.3% 0.0166 -0.1441)
OKLCH	oklch(43.3% 0.145 276.6)
XYZ	xyz(10.2266, 7.5389, 33.2574)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F439E #9E9A3F

analogous

#3F729E #3F439E #6A3F9E

triadic

#3F439E #9E3F43 #439E3F

tetradic

#3F439E #9E3F72 #9E9A3F #3F9E6A

square

#3F439E #9E3F72 #9E9A3F #3F9E6A

split-complementary

#3F439E #9E6A3F #729E3F

monochromatic

#1C1E46 #2E3072 #3F439E #5C60BE #888BD0

Accessibility & contrast

On white

8.37

#3F439E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3F439E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F439E

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F439E	#FFFFFF	#000000	##FFFFFF
##3F439E	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A1

Deuteranopia (green-blind)

#004A9C

Tritanopia (blue-blind)

#00596A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f439e;
/* rgb */ color: rgb(63, 67, 158);
/* oklch */ color: oklch(43.3% 0.145 276.6);

Tailwind

colors: {
  custom: {
    50: '#7d77bb',
    500: '#3f439e',
    950: '#000000',
  },
}

SCSS

$custom: #3f439e;
$custom-light: #7d77bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f439e",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 158
  },
  "hsl": {
    "h": 237.474,
    "s": 42.986,
    "l": 43.333
  },
  "oklch": {
    "l": 0.43303,
    "c": 0.14504,
    "h": 276.6
  },
  "luminance": 0.0754
}

Semantic roles & 50–950 ramp

primary

#3F439E

secondary

#BAB87F

accent

#CD55D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F439E

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

Preview Lab → · Contrast checker → · Palette generator →