Color

#685bdc

#685bdc
hex#685bdc
rgbrgb(104, 91, 220)
hslhsl(246, 65%, 61%)
oklchoklch(0.555 0.19 282.8)
Closest name: slateblue (#6a5acd)Relative luminance 0.1559

Colors that go with #685bdc

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 →

#cfdc5b

#5b8fdc · #a85bdc

#dc685b · #5bdc68

Split-complementary

Open in tool →

#dca85b · #8fdc5b

#dc5b8f · #cfdc5b · #5bdca8

Contrast

#685bdc as textRatioAAAA largeAAAFix
Aaon white
5.1:1passpassfail
  • AAA: use #4d3dd6 as the text (7.11:1)
Aaon black
4.12:1failpassfail
  • AA: use #7063de as the text (4.53:1)
  • AAA: use #968de7 as the text (7.26:1)
  • AA: or shift the background to #f2f2f2 (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 #685bdc as the background.

Brands using this color

Fonts for this mood

#685bdc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

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

tool url/palettes/new/685bdc-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