Color

#7751b3

#7751b3
hex#7751b3
rgbrgb(119, 81, 179)
hslhsl(263, 39%, 51%)
oklchoklch(0.523 0.151 299)
Closest name: slateblue (#6a5acd)Relative luminance 0.1306

Colors that go with #7751b3

Charcoal, Sea Green and Crimson 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 →

#8db351

#515db3 · #a751b3

#b37751 · #51b377

Split-complementary

Open in tool →

#b3a751 · #5db351

#b3515d · #8db351 · #51b3a7

Contrast

#7751b3 as textRatioAAAA largeAAAFix
Aaon white
5.81:1passpassfail
  • AAA: use #6846a0 as the text (7.07:1)
Aaon black
3.61:1failpassfail
  • AA: use #8767bc as the text (4.7:1)
  • AAA: use #a38acc as the text (7.06:1)
  • AA: or shift the background to #e3e3e3 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #7751b3 as the background.

Brands using this color

Fonts for this mood

#7751b3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #7751b3
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 #7751b3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/7751b3-b09cc4-dfd04e-2b1f2d-e9eaf1?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