Color

#780aa3

#780aa3
hex#780aa3
rgbrgb(120, 10, 163)
hslhsl(283, 88%, 34%)
oklchoklch(0.438 0.213 312.3)
Closest name: Fuchsia Nebula (#7722aa)Relative luminance 0.0685

Colors that go with #780aa3

Forest Green, Teal and Sea Green 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 →

#36a30a

#2b0aa3 · #a30a82

#a3780a · #0aa378

Split-complementary

Open in tool →

#82a30a · #0aa32b

#a32b0a · #36a30a · #0a82a3

Contrast

#780aa3 as textRatioAAAA largeAAAFix
Aaon white
8.86:1passpasspassPasses AAA — no fix needed.
Aaon black
2.37:1failfailfail
  • AA: use #b827f1 as the text (4.6:1)
  • AAA: use #ce6af6 as the text (7.02:1)
  • AA: or shift the background to #bababa (4.56:1)
  • AAA: or shift the background to #e6e6e6 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #780aa3 as the background.

Brands using this color

Fonts for this mood

#780aa3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #780aa3
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 #780aa3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/780aa3-bb9fc1-b2cb62-2d1f2b-ebe9f1?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