Color

#2e21ba

#2e21ba
hex#2e21ba
rgbrgb(46, 33, 186)
hslhsl(245, 70%, 43%)
oklchoklch(0.397 0.221 273.4)
Closest name: Galactic Highway (#3311bb)Relative luminance 0.0521

Colors that go with #2e21ba

Charcoal, Steel Blue and Cornflower Blue 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.

Real palettes that use #2e21ba

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#aeba21

#2161ba · #7a21ba

#ba2e21 · #21ba2e

Split-complementary

Open in tool →

#ba7a21 · #61ba21

#ba2161 · #aeba21 · #21ba7a

Contrast

#2e21ba as textRatioAAAA largeAAAFix
Aaon white
10.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.04:1failfailfail
  • AA: use #6e63e3 as the text (4.56:1)
  • AAA: use #928aea as the text (7.05:1)
  • AA: or shift the background to #adadad (4.58:1)
  • AAA: or shift the background to #d6d6d6 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2e21ba 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

#2e21ba reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2e21ba
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 #2e21ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2e21ba-a49cc4-dfa54e-261f2d-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