Color

#3d5fbd

#3d5fbd
hex#3d5fbd
rgbrgb(61, 95, 189)
hslhsl(224, 51%, 49%)
oklchoklch(0.511 0.153 266.2)
Closest name: Denim (#1560bd)Relative luminance 0.1285

Colors that go with #3d5fbd

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 →

#bd9b3d

#3d9fbd · #5b3dbd

#bd3d5f · #5fbd3d

Split-complementary

Open in tool →

#bd5b3d · #9fbd3d

#bd3d9f · #bd9b3d · #3dbd5b

Contrast

#3d5fbd as textRatioAAAA largeAAAFix
Aaon white
5.88:1passpassfail
  • AAA: use #3654a6 as the text (7.06:1)
Aaon black
3.57:1failpassfail
  • AA: use #5271c7 as the text (4.55:1)
  • AAA: use #7c94d5 as the text (7.05:1)
  • AA: or shift the background to #e3e3e3 (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 #3d5fbd as the background.

Brands using this color

Fonts for this mood

#3d5fbd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d5fbd
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 #3d5fbd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d5fbd-9ca2c4-df724e-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