Color

#183a33

#183a33
hex#183a33
rgbrgb(24, 58, 51)
hslhsl(168, 41%, 16%)
oklchoklch(0.321 0.042 178.2)
Closest name: Botanical Night (#12403c)Relative luminance 0.0346

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3a181f

#183a22 · #182f3a

#33183a · #3a3318

Split-complementary

Open in tool →

#3a182f · #3a2218

#22183a · #3a181f · #2f3a18

Contrast

#183a33 as textRatioAAAA largeAAAFix
Aaon white
12.41:1passpasspassPasses AAA — no fix needed.
Aaon black
1.69:1failfailfail
  • AA: use #368172 as the text (4.54:1)
  • AAA: use #45a592 as the text (7.05:1)
  • AA: or shift the background to #9c9c9c (4.52:1)
  • AAA: or shift the background to #c4c4c4 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #183a33 as the background.

Brands using this color

Fonts for this mood

#183a33 reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #183a33
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 #183a33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/183a33-a2bebc-d459ad-1f2a2d-e9f1ec?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