#3F439F#3F439F

#3F439F is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.4% C 0.146 H 276.5°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#3F439F
RGB	rgb(63, 67, 159)
HSL	hsl(238, 43%, 44%)
HSV	hsv(238, 60%, 62%)
CMYK	cmyk(60.4%, 57.9%, 0%, 37.6%)
CIE-LAB	lab(33.08, 26.94, -50.69)
CIE-LCH	lch(33.08, 57.40, 297.99°)
OKLab	oklab(43.38% 0.0167 -0.1455)
OKLCH	oklch(43.38% 0.146 276.5)
XYZ	xyz(10.3130, 7.5735, 33.7125)
Luminance	0.0757 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F439F #9F9B3F

analogous

#3F739F #3F439F #6B3F9F

triadic

#3F439F #9F3F43 #439F3F

tetradic

#3F439F #9F3F73 #9F9B3F #3F9F6B

square

#3F439F #9F3F73 #9F9B3F #3F9F6B

split-complementary

#3F439F #9F6B3F #739F3F

monochromatic

#1C1E47 #2E3173 #3F439F #5D61BF #888BD0

Accessibility & contrast

On white

8.35

#3F439F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3F439F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F439F

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F439F	#FFFFFF	#000000	##FFFFFF
##3F439F	1.00	8.35	2.51	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A2

Deuteranopia (green-blind)

#004A9D

Tritanopia (blue-blind)

#00596A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f439f;
/* rgb */ color: rgb(63, 67, 159);
/* oklch */ color: oklch(43.4% 0.146 276.5);

Tailwind

colors: {
  custom: {
    50: '#7e77bc',
    500: '#3f439f',
    950: '#000000',
  },
}

SCSS

$custom: #3f439f;
$custom-light: #7e77bc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f439f",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 159
  },
  "hsl": {
    "h": 237.5,
    "s": 43.243,
    "l": 43.529
  },
  "oklch": {
    "l": 0.43382,
    "c": 0.14645,
    "h": 276.5
  },
  "luminance": 0.07574
}

Semantic roles & 50–950 ramp

primary

#3F439F

secondary

#BBB87F

accent

#CE55D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F439F

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

Preview Lab → · Contrast checker → · Palette generator →