Color

#685ec5

#685ec5
hex#685ec5
rgbrgb(104, 94, 197)
hslhsl(246, 47%, 57%)
oklchoklch(0.543 0.155 284.4)
Closest name: slateblue (#6a5acd)Relative luminance 0.1498

Colors that go with #685ec5

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 →

#bbc55e

#5e87c5 · #9c5ec5

#c5685e · #5ec568

Split-complementary

Open in tool →

#c59c5e · #87c55e

#c55e87 · #bbc55e · #5ec59c

Contrast

#685ec5 as textRatioAAAA largeAAAFix
Aaon white
5.26:1passpassfail
  • AAA: use #5044bb as the text (7.28:1)
Aaon black
4:1failpassfail
  • AA: use #7369c9 as the text (4.59:1)
  • AAA: use #968fd6 as the text (7.2:1)
  • AA: or shift the background to #f0f0f0 (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #685ec5 as the background.

Brands using this color

Fonts for this mood

#685ec5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #685ec5
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 #685ec5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/685ec5-a59cc4-dfa74e-271f2d-e9ecf1?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