#3F445B#3F445B

#3F445B is a dark, muted blue. Relative luminance 0.059; OKLCH L 39.2% C 0.040 H 274.9°. Best body text is #FFFFFF at 9.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F445B
RGB	rgb(63, 68, 91)
HSL	hsl(229, 18%, 30%)
HSV	hsv(229, 31%, 36%)
CMYK	cmyk(30.8%, 25.3%, 0%, 64.3%)
CIE-LAB	lab(29.28, 3.98, -14.31)
CIE-LCH	lch(29.28, 14.85, 285.55°)
OKLab	oklab(39.17% 0.0034 -0.0394)
OKLCH	oklch(39.17% 0.04 274.9)
XYZ	xyz(6.0048, 5.9462, 10.7268)
Luminance	0.0595 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F445B #5B563F

analogous

#3F525B #3F445B #483F5B

triadic

#3F445B #5B3F44 #445B3F

tetradic

#3F445B #5B3F52 #5B563F #3F5B48

square

#3F445B #5B3F52 #5B563F #3F5B48

split-complementary

#3F445B #5B483F #525B3F

monochromatic

#0D0E13 #262937 #3F445B #585F7F #757D9F

Accessibility & contrast

On white

9.59

#3F445B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#3F445B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F445B

9.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F445B	#FFFFFF	#000000	##FFFFFF
##3F445B	1.00	9.59	2.19	9.59
#FFFFFF	9.59	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D465C

Deuteranopia (green-blind)

#3B445A

Tritanopia (blue-blind)

#38484C

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3f445b;
/* rgb */ color: rgb(63, 68, 91);
/* oklch */ color: oklch(39.2% 0.040 274.9);

Tailwind

colors: {
  custom: {
    50: '#747789',
    500: '#3f445b',
    950: '#000000',
  },
}

SCSS

$custom: #3f445b;
$custom-light: #747789;
$custom-dark: #000000;

JSON

{
  "hex": "#3f445b",
  "rgb": {
    "r": 63,
    "g": 68,
    "b": 91
  },
  "hsl": {
    "h": 229.286,
    "s": 18.182,
    "l": 30.196
  },
  "oklch": {
    "l": 0.39174,
    "c": 0.0396,
    "h": 274.9
  },
  "luminance": 0.05946
}

Semantic roles & 50–950 ramp

primary

#3F445B

secondary

#8B856B

accent

#AD6DBB

background

#F7F7F8

surface

#EDEDF0

border

#C8C8CB

text

#08080B

muted

#7B7B7C

Preview Lab

Preview with #3F445B

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

Preview Lab → · Contrast checker → · Palette generator →