#3F4C8D#3F4C8D

#3F4C8D is a dark, moderate blue. Relative luminance 0.081; OKLCH L 43.9% C 0.108 H 272.7°. Best body text is #FFFFFF at 7.99:1 contrast (WCAG AA passes).

Color values

HEX	#3F4C8D
RGB	rgb(63, 76, 141)
HSL	hsl(230, 38%, 40%)
HSV	hsv(230, 55%, 55%)
CMYK	cmyk(55.3%, 46.1%, 0%, 44.7%)
CIE-LAB	lab(34.29, 14.79, -37.80)
CIE-LCH	lch(34.29, 40.59, 291.37°)
OKLab	oklab(43.9% 0.0051 -0.1075)
OKLCH	oklch(43.9% 0.108 272.7)
XYZ	xyz(9.4405, 8.1481, 26.2694)
Luminance	0.0815 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4C8D #8D803F

analogous

#3F738D #3F4C8D #593F8D

triadic

#3F4C8D #8D3F4C #4C8D3F

tetradic

#3F4C8D #8D3F73 #8D803F #3F8D59

square

#3F4C8D #8D3F73 #8D803F #3F8D59

split-complementary

#3F4C8D #8D593F #738D3F

monochromatic

#191E38 #2C3563 #3F4C8D #5665B3 #808CC6

Accessibility & contrast

On white

7.99

#3F4C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3F4C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4C8D

7.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4C8D	#FFFFFF	#000000	##FFFFFF
##3F4C8D	1.00	7.99	2.63	7.99
#FFFFFF	7.99	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#30548F

Deuteranopia (green-blind)

#264D8C

Tritanopia (blue-blind)

#185A65

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f4c8d;
/* rgb */ color: rgb(63, 76, 141);
/* oklch */ color: oklch(43.9% 0.108 272.7);

Tailwind

colors: {
  custom: {
    50: '#7a7daf',
    500: '#3f4c8d',
    950: '#000000',
  },
}

SCSS

$custom: #3f4c8d;
$custom-light: #7a7daf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4c8d",
  "rgb": {
    "r": 63,
    "g": 76,
    "b": 141
  },
  "hsl": {
    "h": 230,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.43903,
    "c": 0.10765,
    "h": 272.7
  },
  "luminance": 0.08149
}

Semantic roles & 50–950 ramp

primary

#3F4C8D

secondary

#B1A777

accent

#BB5ACE

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F4C8D

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

Preview Lab → · Contrast checker → · Palette generator →