Color

#503e51

#503e51
hex#503e51
rgbrgb(80, 62, 81)
hslhsl(297, 13%, 28%)
oklchoklch(0.39 0.039 324.6)
Closest name: Black Magic (#4f4554)Relative luminance 0.0574

Colors that go with #503e51

Sea Green, Teal and Blue 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.

Real palettes that use #503e51

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f513e

#463e51 · #513e48

#51503e · #3e5150

Split-complementary

Open in tool →

#48513e · #3e5146

#51463e · #3f513e · #3e4851

Contrast

#503e51 as textRatioAAAA largeAAAFix
Aaon white
9.77:1passpasspassPasses AAA — no fix needed.
Aaon black
2.15:1failfailfail
  • AA: use #8c6d8d as the text (4.69:1)
  • AAA: use #a78fa8 as the text (7.14:1)
  • AA: or shift the background to #b0b0b0 (4.51:1)
  • AAA: or shift the background to #dbdbdb (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #503e51 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

#503e51 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #503e51
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 #503e51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/503e51-c19fbe-9acb62-2d1f28-ede9f1?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