Color

#2a09d3

#2a09d3
hex#2a09d3
rgbrgb(42, 9, 211)
hslhsl(250, 92%, 43%)
oklchoklch(0.409 0.261 271)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0539

Colors that go with #2a09d3

Charcoal, Cornflower Blue 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 →

#b1d309

#094cd3 · #8f09d3

#d32a09 · #09d32a

Split-complementary

Open in tool →

#d38f09 · #4cd309

#d3094c · #b1d309 · #09d38f

Contrast

#2a09d3 as textRatioAAAA largeAAAFix
Aaon white
10.11:1passpasspassPasses AAA — no fix needed.
Aaon black
2.08:1failfailfail
  • AA: use #7359f8 as the text (4.51:1)
  • AAA: use #9885fa as the text (7.07:1)
  • AA: or shift the background to #adadad (4.5:1)
  • AAA: or shift the background to #d9d9d9 (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2a09d3 as the background.

Brands using this color

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

Fonts for this mood

#2a09d3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a09d3
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 #2a09d3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a09d3-a79cc4-dfb14e-281f2d-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