Color

#301f33

#301f33
hex#301f33
rgbrgb(48, 31, 51)
hslhsl(291, 24%, 16%)
oklchoklch(0.269 0.043 321.4)
Closest name: Black Velvet (#222233)Relative luminance 0.0185

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#22331f

#261f33 · #331f2c

#33301f · #1f3330

Split-complementary

Open in tool →

#2c331f · #1f3326

#33261f · #22331f · #1f2c33

Contrast

#301f33 as textRatioAAAA largeAAAFix
Aaon white
15.33:1passpasspassPasses AAA — no fix needed.
Aaon black
1.37:1failfailfail
  • AA: use #9764a0 as the text (4.65:1)
  • AAA: use #b18ab7 as the text (7.19:1)
  • AA: or shift the background to #8c8c8c (4.56:1)
  • AAA: or shift the background to #b0b0b0 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #301f33 as the background.

Brands using this color

Fonts for this mood

#301f33 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #301f33
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #301f33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/301f33-bf9fc1-a4cb62-2d1f29-ece9f1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md