Color

#2f21f2

#2f21f2
hex#2f21f2
rgbrgb(47, 33, 242)
hslhsl(244, 89%, 54%)
oklchoklch(0.464 0.282 270.1)
Closest name: Bluebonnet (#1c1cf0)Relative luminance 0.081

Colors that go with #2f21f2

Charcoal, Cobalt 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e4f221

#217cf2 · #9821f2

#f22f21 · #21f22f

Split-complementary

Open in tool →

#f29821 · #7cf221

#f2217c · #e4f221 · #21f298

Contrast

#2f21f2 as textRatioAAAA largeAAAFix
Aaon white
8.01:1passpasspassPasses AAA — no fix needed.
Aaon black
2.62:1failfailfail
  • AA: use #6a60f6 as the text (4.62:1)
  • AAA: use #938bf8 as the text (7.29:1)
  • AA: or shift the background to #c4c4c4 (4.59:1)
  • AAA: or shift the background to #f0f0f0 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2f21f2 as the background.

Brands using this color

Fonts for this mood

#2f21f2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2f21f2
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 #2f21f2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2f21f2-a39cc4-dfa24e-261f2d-e9edf1?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