Color

#2d515d

#2d515d
hex#2d515d
rgbrgb(45, 81, 93)
hslhsl(195, 35%, 27%)
oklchoklch(0.413 0.046 221.5)
Closest name: darkslategray (#2f4f4f)Relative luminance 0.0723

Colors that go with #2d515d

Steel Blue, Teal and Sienna lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5d392d

#2d5d51 · #2d395d

#5d2d51 · #515d2d

Split-complementary

Open in tool →

#5d2d39 · #5d512d

#512d5d · #5d392d · #395d2d

Contrast

#2d515d as textRatioAAAA largeAAAFix
Aaon white
8.58:1passpasspassPasses AAA — no fix needed.
Aaon black
2.45:1failfailfail
  • AA: use #467e91 as the text (4.65:1)
  • AAA: use #619eb3 as the text (7.05:1)
  • AA: or shift the background to #bdbdbd (4.57:1)
  • AAA: or shift the background to #e8e8e8 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2d515d as the background.

Brands using this color

Fonts for this mood

#2d515d reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2d515d
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

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

analyze #2d515d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2d515d-9cb5c4-df4e70-1f242d-e9f1ef?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