The hexcode #33181C is a darker, cooler, and less saturated variant of the shade "<shade>Dark Sienna</shade>". By itself, it is commonly associated with <term>sturdy</term> (96.0% match), <term>auburn</term> (95.1% match), and <term>victory</term> (94.2% match).
When Dark Sienna is combined with <shade>Black</shade>, it relates to the terms <term>sturdy</term> and <term>auburn</term>. When joined with <shade>Smoky Black</shade>, it becomes more related to the term <term>metallic</term>. When Dark Sienna is added to <shade>Rich Black</shade>, it shares association with the terms <term>serious</term> and <term>metallic</term>. 
When paired with its complementary color #183430, a darker and more saturated variant of the shade "<shade>Outer Space</shade>", it shares connection with the terms <term>security</term> or <term>dignified</term>.
However, when we analyze the color next to its other triadic colors, #1C3418 (a shade of "<shade>Phthalo Green</shade>") and #181C34 (a shade of "<shade>Space Cadet</shade>"), the resulting palette becomes softer and warmer than the complementary color palette and changes from the color index category of "<category>casual</category>" to the "<category>elegant</category>" category. Specifically, the new triad is most suggestive of <term>murky</term> and <term>traditional</term>.