#3F4B8D#3F4B8D

#3F4B8D is a dark, moderate blue. Relative luminance 0.080; OKLCH L 43.7% C 0.109 H 273.3°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#3F4B8D
RGB	rgb(63, 75, 141)
HSL	hsl(231, 38%, 40%)
HSV	hsv(231, 55%, 55%)
CMYK	cmyk(55.3%, 46.8%, 0%, 44.7%)
CIE-LAB	lab(34.01, 15.45, -38.25)
CIE-LCH	lch(34.01, 41.25, 291.99°)
OKLab	oklab(43.69% 0.0063 -0.1089)
OKLCH	oklch(43.69% 0.109 273.3)
XYZ	xyz(9.3721, 8.0114, 26.2466)
Luminance	0.0801 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4B8D #8D813F

analogous

#3F728D #3F4B8D #5A3F8D

triadic

#3F4B8D #8D3F4B #4B8D3F

tetradic

#3F4B8D #8D3F72 #8D813F #3F8D5A

square

#3F4B8D #8D3F72 #8D813F #3F8D5A

split-complementary

#3F4B8D #8D5A3F #728D3F

monochromatic

#191E38 #2C3563 #3F4B8D #5664B3 #808BC6

Accessibility & contrast

On white

8.07

#3F4B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3F4B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4B8D

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4B8D	#FFFFFF	#000000	##FFFFFF
##3F4B8D	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E538F

Deuteranopia (green-blind)

#254D8C

Tritanopia (blue-blind)

#185965

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f4b8d;
/* rgb */ color: rgb(63, 75, 141);
/* oklch */ color: oklch(43.7% 0.109 273.3);

Tailwind

colors: {
  custom: {
    50: '#7a7daf',
    500: '#3f4b8d',
    950: '#000000',
  },
}

SCSS

$custom: #3f4b8d;
$custom-light: #7a7daf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4b8d",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 141
  },
  "hsl": {
    "h": 230.769,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.43687,
    "c": 0.10905,
    "h": 273.3
  },
  "luminance": 0.08012
}

Semantic roles & 50–950 ramp

primary

#3F4B8D

secondary

#B1A877

accent

#BC5ACE

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F4B8D

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

Preview Lab → · Contrast checker → · Palette generator →