Color

#645da8

#645da8
hex#645da8
rgbrgb(100, 93, 168)
hslhsl(246, 30%, 51%)
oklchoklch(0.52 0.116 285.9)
Closest name: Bellflower (#5d66aa)Relative luminance 0.1337

Colors that go with #645da8

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 →

#a0a85d

#5d7ba8 · #8a5da8

#a8645d · #5da864

Split-complementary

Open in tool →

#a88a5d · #7ba85d

#a85d7b · #a0a85d · #5da88a

Contrast

#645da8 as textRatioAAAA largeAAAFix
Aaon white
5.72:1passpassfail
  • AAA: use #575095 as the text (7.03:1)
Aaon black
3.67:1failpassfail
  • AA: use #746db0 as the text (4.56:1)
  • AAA: use #9792c4 as the text (7.22:1)
  • AA: or shift the background to #e6e6e6 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #645da8 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #645da8
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 #645da8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/645da8-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