Color

#3734df

#3734df
hex#3734df
rgbrgb(55, 52, 223)
hslhsl(241, 73%, 54%)
oklchoklch(0.466 0.246 272.2)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.086

Colors that go with #3734df

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 →

#dcdf34

#3487df · #8d34df

#df3734 · #34df37

Split-complementary

Open in tool →

#df8d34 · #87df34

#df3487 · #dcdf34 · #34df8d

Contrast

#3734df as textRatioAAAA largeAAAFix
Aaon white
7.72:1passpasspassPasses AAA — no fix needed.
Aaon black
2.72:1failfailfail
  • AA: use #6765e7 as the text (4.59:1)
  • AAA: use #8e8ced as the text (7.12:1)
  • AA: or shift the background to #c7c7c7 (4.57:1)
  • AAA: or shift the background to #f5f5f5 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3734df 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

#3734df reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3734df
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 #3734df and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3734df-a19cc4-df9b4e-261f2d-e9edf1?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