Color

#2745dd

#2745dd
hex#2745dd
rgbrgb(39, 69, 221)
hslhsl(230, 73%, 51%)
oklchoklch(0.481 0.231 267.2)
Closest name: C64 Blue (#003aff)Relative luminance 0.0991

Colors that go with #2745dd

Charcoal, Sea Green 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.

Real palettes that use #2745dd

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ddbf27

#27a0dd · #6427dd

#dd2745 · #45dd27

Split-complementary

Open in tool →

#dd6427 · #a0dd27

#dd27a0 · #ddbf27 · #27dd64

Contrast

#2745dd as textRatioAAAA largeAAAFix
Aaon white
7.04:1passpasspassPasses AAA — no fix needed.
Aaon black
2.98:1failfailfail
  • AA: use #536be4 as the text (4.59:1)
  • AAA: use #7f91eb as the text (7.15:1)
  • AA: or shift the background to #cfcfcf (4.52:1)
  • AAA: or shift the background to #ffffff (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2745dd as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2745dd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2745dd
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 #2745dd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2745dd-9c9ec4-df814e-231f2d-e9eef1?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