Color

#2a5dbb

#2a5dbb
hex#2a5dbb
rgbrgb(42, 93, 187)
hslhsl(219, 63%, 45%)
oklchoklch(0.498 0.158 261.3)
Closest name: Denim (#1560bd)Relative luminance 0.1191

Colors that go with #2a5dbb

Charcoal, Sea Green and Sienna 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 →

#bb882a

#2aa5bb · #402abb

#bb2a5d · #5dbb2a

Split-complementary

Open in tool →

#bb402a · #a5bb2a

#bb2aa5 · #bb882a · #2abb40

Contrast

#2a5dbb as textRatioAAAA largeAAAFix
Aaon white
6.21:1passpassfail
  • AAA: use #2755aa as the text (7.08:1)
Aaon black
3.38:1failpassfail
  • AA: use #4074d4 as the text (4.67:1)
  • AAA: use #6e95de as the text (7.02:1)
  • AA: or shift the background to #dedede (4.62:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2a5dbb as the background.

Brands using this color

Fonts for this mood

#2a5dbb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a5dbb
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 #2a5dbb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a5dbb-9ca5c4-df664e-211f2d-e9f0f1?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