Color

#515aa4

#515aa4
hex#515aa4
rgbrgb(81, 90, 164)
hslhsl(233, 34%, 48%)
oklchoklch(0.496 0.118 276)
Closest name: Bellflower (#5d66aa)Relative luminance 0.1174

Colors that go with #515aa4

Charcoal, Sea Green and Amber 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 →

#a49a51

#5184a4 · #7151a4

#a4515a · #5aa451

Split-complementary

Open in tool →

#a47151 · #84a451

#a45184 · #a49a51 · #51a471

Contrast

#515aa4 as textRatioAAAA largeAAAFix
Aaon white
6.27:1passpassfail
  • AAA: use #4a5396 as the text (7.07:1)
Aaon black
3.35:1failpassfail
  • AA: use #6972b5 as the text (4.67:1)
  • AAA: use #8b92c6 as the text (7.02:1)
  • AA: or shift the background to #dbdbdb (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #515aa4 as the background.

Brands using this color

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

mcpConnect your agent — build around #515aa4
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 #515aa4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/515aa4-9c9cc4-df884e-241f2d-e9eef1?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