Color

#183f33

#183f33
hex#183f33
rgbrgb(24, 63, 51)
hslhsl(162, 45%, 17%)
oklchoklch(0.335 0.049 170.4)
Closest name: Botanical Night (#12403c)Relative luminance 0.0399

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f1824

#183f20 · #18373f

#33183f · #3f3318

Split-complementary

Open in tool →

#3f1837 · #3f2018

#20183f · #3f1824 · #373f18

Contrast

#183f33 as textRatioAAAA largeAAAFix
Aaon white
11.68:1passpasspassPasses AAA — no fix needed.
Aaon black
1.8:1failfailfail
  • AA: use #32856c as the text (4.71:1)
  • AAA: use #3fa687 as the text (7.02:1)
  • AA: or shift the background to #a1a1a1 (4.52:1)
  • AAA: or shift the background to #c9c9c9 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #183f33 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#183f33 reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #183f33
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 #183f33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/183f33-a2beb9-d459b9-1f2b2d-e9f1eb?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