#3F4A8D#3F4A8D

#3F4A8D is a dark, moderate blue. Relative luminance 0.079; OKLCH L 43.5% C 0.110 H 273.9°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#3F4A8D
RGB	rgb(63, 74, 141)
HSL	hsl(232, 38%, 40%)
HSV	hsv(232, 55%, 55%)
CMYK	cmyk(55.3%, 47.5%, 0%, 44.7%)
CIE-LAB	lab(33.73, 16.11, -38.70)
CIE-LCH	lch(33.73, 41.92, 292.60°)
OKLab	oklab(43.47% 0.0075 -0.1102)
OKLCH	oklch(43.47% 0.11 273.9)
XYZ	xyz(9.3048, 7.8768, 26.2242)
Luminance	0.0788 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4A8D #8D823F

analogous

#3F718D #3F4A8D #5B3F8D

triadic

#3F4A8D #8D3F4A #4A8D3F

tetradic

#3F4A8D #8D3F71 #8D823F #3F8D5B

square

#3F4A8D #8D3F71 #8D823F #3F8D5B

split-complementary

#3F4A8D #8D5B3F #718D3F

monochromatic

#191E38 #2C3463 #3F4A8D #5663B3 #808AC6

Accessibility & contrast

On white

8.15

#3F4A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3F4A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4A8D

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4A8D	#FFFFFF	#000000	##FFFFFF
##3F4A8D	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C538F

Deuteranopia (green-blind)

#234C8C

Tritanopia (blue-blind)

#195964

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f4a8d;
/* rgb */ color: rgb(63, 74, 141);
/* oklch */ color: oklch(43.5% 0.110 273.9);

Tailwind

colors: {
  custom: {
    50: '#7a7caf',
    500: '#3f4a8d',
    950: '#000000',
  },
}

SCSS

$custom: #3f4a8d;
$custom-light: #7a7caf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4a8d",
  "rgb": {
    "r": 63,
    "g": 74,
    "b": 141
  },
  "hsl": {
    "h": 231.538,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.43473,
    "c": 0.11046,
    "h": 273.9
  },
  "luminance": 0.07877
}

Semantic roles & 50–950 ramp

primary

#3F4A8D

secondary

#B1A877

accent

#BE5ACE

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F4A8D

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

Preview Lab → · Contrast checker → · Palette generator →