#3F4A8A#3F4A8A

#3F4A8A is a dark, moderate blue. Relative luminance 0.078; OKLCH L 43.3% C 0.106 H 273.8°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#3F4A8A
RGB	rgb(63, 74, 138)
HSL	hsl(231, 37%, 39%)
HSV	hsv(231, 54%, 54%)
CMYK	cmyk(54.3%, 46.4%, 0%, 45.9%)
CIE-LAB	lab(33.54, 15.08, -37.16)
CIE-LCH	lch(33.54, 40.10, 292.09°)
OKLab	oklab(43.27% 0.0071 -0.1057)
OKLCH	oklch(43.27% 0.106 273.8)
XYZ	xyz(9.0847, 7.7887, 25.0645)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4A8A #8A7F3F

analogous

#3F708A #3F4A8A #5A3F8A

triadic

#3F4A8A #8A3F4A #4A8A3F

tetradic

#3F4A8A #8A3F70 #8A7F3F #3F8A5A

square

#3F4A8A #8A3F70 #8A7F3F #3F8A5A

split-complementary

#3F4A8A #8A5A3F #708A3F

monochromatic

#191D36 #2C3360 #3F4A8A #5562B1 #7F89C5

Accessibility & contrast

On white

8.21

#3F4A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3F4A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4A8A

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4A8A	#FFFFFF	#000000	##FFFFFF
##3F4A8A	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E528C

Deuteranopia (green-blind)

#264C89

Tritanopia (blue-blind)

#1C5863

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f4a8a;
/* rgb */ color: rgb(63, 74, 138);
/* oklch */ color: oklch(43.3% 0.106 273.8);

Tailwind

colors: {
  custom: {
    50: '#7a7cac',
    500: '#3f4a8a',
    950: '#000000',
  },
}

SCSS

$custom: #3f4a8a;
$custom-light: #7a7cac;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4a8a",
  "rgb": {
    "r": 63,
    "g": 74,
    "b": 138
  },
  "hsl": {
    "h": 231.2,
    "s": 37.313,
    "l": 39.412
  },
  "oklch": {
    "l": 0.43271,
    "c": 0.1059,
    "h": 273.8
  },
  "luminance": 0.07789
}

Semantic roles & 50–950 ramp

primary

#3F4A8A

secondary

#AFA676

accent

#BC5BCD

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F4A8A

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

Preview Lab → · Contrast checker → · Palette generator →