#3F4D8D#3F4D8D

#3F4D8D is a dark, moderate blue. Relative luminance 0.083; OKLCH L 44.1% C 0.106 H 272.1°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F4D8D
RGB	rgb(63, 77, 141)
HSL	hsl(229, 38%, 40%)
HSV	hsv(229, 55%, 55%)
CMYK	cmyk(55.3%, 45.4%, 0%, 44.7%)
CIE-LAB	lab(34.57, 14.13, -37.35)
CIE-LCH	lch(34.57, 39.93, 290.73°)
OKLab	oklab(44.12% 0.0039 -0.1062)
OKLCH	oklch(44.12% 0.106 272.1)
XYZ	xyz(9.5099, 8.2869, 26.2926)
Luminance	0.0829 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4D8D #8D7F3F

analogous

#3F748D #3F4D8D #583F8D

triadic

#3F4D8D #8D3F4D #4D8D3F

tetradic

#3F4D8D #8D3F74 #8D7F3F #3F8D58

square

#3F4D8D #8D3F74 #8D7F3F #3F8D58

split-complementary

#3F4D8D #8D583F #748D3F

monochromatic

#191F38 #2C3663 #3F4D8D #5667B3 #808DC6

Accessibility & contrast

On white

7.90

#3F4D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3F4D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4D8D

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4D8D	#FFFFFF	#000000	##FFFFFF
##3F4D8D	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#31558F

Deuteranopia (green-blind)

#284E8C

Tritanopia (blue-blind)

#185B66

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f4d8d;
/* rgb */ color: rgb(63, 77, 141);
/* oklch */ color: oklch(44.1% 0.106 272.1);

Tailwind

colors: {
  custom: {
    50: '#7a7eaf',
    500: '#3f4d8d',
    950: '#000000',
  },
}

SCSS

$custom: #3f4d8d;
$custom-light: #7a7eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4d8d",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 141
  },
  "hsl": {
    "h": 229.231,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.4412,
    "c": 0.10626,
    "h": 272.1
  },
  "luminance": 0.08288
}

Semantic roles & 50–950 ramp

primary

#3F4D8D

secondary

#B1A677

accent

#B95ACE

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F4D8D

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

Preview Lab → · Contrast checker → · Palette generator →