Color

#505cb4

#505cb4
hex#505cb4
rgbrgb(80, 92, 180)
hslhsl(233, 40%, 51%)
oklchoklch(0.51 0.138 274.6)
Closest name: Bellflower (#5d66aa)Relative luminance 0.1266

Colors that go with #505cb4

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 →

#b4a850

#508eb4 · #7650b4

#b4505c · #5cb450

Split-complementary

Open in tool →

#b47650 · #8eb450

#b4508e · #b4a850 · #50b476

Contrast

#505cb4 as textRatioAAAA largeAAAFix
Aaon white
5.95:1passpassfail
  • AAA: use #4651a4 as the text (7.06:1)
Aaon black
3.53:1failpassfail
  • AA: use #6570bd as the text (4.61:1)
  • AAA: use #8d94ce as the text (7.26:1)
  • AA: or shift the background to #e0e0e0 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #505cb4 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

#505cb4 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #505cb4
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 #505cb4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/505cb4-9c9cc4-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