Color

#2b64e9

#2b64e9
hex#2b64e9
rgbrgb(43, 100, 233)
hslhsl(222, 81%, 54%)
oklchoklch(0.548 0.21 263.5)
Closest name: Bluetiful (#3c69e7)Relative luminance 0.1551

Colors that go with #2b64e9

Charcoal, Crimson and Amber 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 →

#e9b02b

#2bc3e9 · #512be9

#e92b64 · #64e92b

Split-complementary

Open in tool →

#e9512b · #c3e92b

#e92bc3 · #e9b02b · #2be951

Contrast

#2b64e9 as textRatioAAAA largeAAAFix
Aaon white
5.12:1passpassfail
  • AAA: use #154ccb as the text (7.17:1)
Aaon black
4.1:1failpassfail
  • AA: use #396eea as the text (4.59:1)
  • AAA: use #6b93ef as the text (7.05:1)
  • AA: or shift the background to #f2f2f2 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b64e9 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2b64e9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b64e9
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 #2b64e9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b64e9-9ca3c4-df6e4e-211f2d-e9eff1?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