Color

#345acb

#345acb
hex#345acb
rgbrgb(52, 90, 203)
hslhsl(225, 59%, 50%)
oklchoklch(0.508 0.181 266)
Closest name: Denim (#1560bd)Relative luminance 0.1235

Colors that go with #345acb

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cba534

#34a5cb · #5a34cb

#cb345a · #5acb34

Split-complementary

Open in tool →

#cb5a34 · #a5cb34

#cb34a5 · #cba534 · #34cb5a

Contrast

#345acb as textRatioAAAA largeAAAFix
Aaon white
6.05:1passpassfail
  • AAA: use #2f51b6 as the text (7.06:1)
Aaon black
3.47:1failpassfail
  • AA: use #5171d2 as the text (4.64:1)
  • AAA: use #7d95de as the text (7.23:1)
  • AA: or shift the background to #e0e0e0 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #345acb as the background.

Brands using this color

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

Fonts for this mood

#345acb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #345acb
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 #345acb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/345acb-9ca1c4-df754e-221f2d-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