Color

#274bdd

#274bdd
hex#274bdd
rgbrgb(39, 75, 221)
hslhsl(228, 73%, 51%)
oklchoklch(0.491 0.225 266.5)
Closest name: C64 Blue (#003aff)Relative luminance 0.1068

Colors that go with #274bdd

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 #274bdd

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ddb927

#27a7dd · #5e27dd

#dd274b · #4bdd27

Split-complementary

Open in tool →

#dd5e27 · #a7dd27

#dd27a7 · #ddb927 · #27dd5e

Contrast

#274bdd as textRatioAAAA largeAAAFix
Aaon white
6.69:1passpassfail
  • AAA: use #2246d8 as the text (7.15:1)
Aaon black
3.14:1failpassfail
  • AA: use #4f6ce3 as the text (4.59:1)
  • AAA: use #7b91ea as the text (7.08:1)
  • AA: or shift the background to #d4d4d4 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #274bdd as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#274bdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #274bdd
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 #274bdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/274bdd-9c9fc4-df7c4e-231f2d-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