Color

#517ecd

#517ecd
hex#517ecd
rgbrgb(81, 126, 205)
hslhsl(218, 55%, 56%)
oklchoklch(0.598 0.131 260.9)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2108

Colors that go with #517ecd

Charcoal, Copper 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 →

#cd9f51

#51bccd · #6251cd

#cd517e · #7ecd51

Split-complementary

Open in tool →

#cd6251 · #bccd51

#cd51bc · #cd9f51 · #51cd62

Contrast

#517ecd as textRatioAAAA largeAAAFix
Aaon white
4.03:1failpassfail
  • AA: use #4173c8 as the text (4.66:1)
  • AAA: use #2e579e as the text (7.06:1)
  • AA: or shift the background to #141414 (4.58:1)
Aaon black
5.22:1passpassfail
  • AAA: use #7196d6 as the text (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #517ecd 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

#517ecd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #517ecd
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 #517ecd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/517ecd-9ca6c4-df644e-201f2d-e9f0f1?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