Color

#615cbc

#615cbc
hex#615cbc
rgbrgb(97, 92, 188)
hslhsl(243, 42%, 55%)
oklchoklch(0.528 0.146 282.5)
Closest name: slateblue (#6a5acd)Relative luminance 0.1383

Colors that go with #615cbc

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 →

#b8bc5c

#5c87bc · #915cbc

#bc615c · #5cbc61

Split-complementary

Open in tool →

#bc915c · #87bc5c

#bc5c87 · #b8bc5c · #5cbc91

Contrast

#615cbc as textRatioAAAA largeAAAFix
Aaon white
5.58:1passpassfail
  • AAA: use #4f4ab5 as the text (7.05:1)
Aaon black
3.77:1failpassfail
  • AA: use #6f6bc2 as the text (4.56:1)
  • AAA: use #928fd1 as the text (7.07:1)
  • AA: or shift the background to #e8e8e8 (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #615cbc as the background.

Brands using this color

Fonts for this mood

#615cbc reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #615cbc
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 #615cbc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/615cbc-a39cc4-dfa04e-261f2d-e9edf1?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