Color

#355ce9

#355ce9
hex#355ce9
rgbrgb(53, 92, 233)
hslhsl(227, 80%, 56%)
oklchoklch(0.537 0.217 266.8)
Closest name: Bluetiful (#3c69e7)Relative luminance 0.1429

Colors that go with #355ce9

Crimson, Slate Gray and Olive Green 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 →

#e9c235

#35b6e9 · #6835e9

#e9355c · #5ce935

Split-complementary

Open in tool →

#e96835 · #b6e935

#e935b6 · #e9c235 · #35e968

Contrast

#355ce9 as textRatioAAAA largeAAAFix
Aaon white
5.44:1passpassfail
  • AAA: use #1944e1 as the text (7.11:1)
Aaon black
3.86:1failpassfail
  • AA: use #476beb as the text (4.57:1)
  • AAA: use #7590f0 as the text (7:1)
  • AA: or shift the background to #ebebeb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #355ce9 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

#355ce9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #355ce9
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 #355ce9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/355ce9-9ca0c4-df7a4e-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