Color

#355fde

#355fde
hex#355fde
rgbrgb(53, 95, 222)
hslhsl(225, 72%, 54%)
oklchoklch(0.533 0.2 265.9)
Closest name: Royal Blue (#4169e1)Relative luminance 0.1422

Colors that go with #355fde

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 →

#deb435

#35b4de · #5f35de

#de355f · #5fde35

Split-complementary

Open in tool →

#de5f35 · #b4de35

#de35b4 · #deb435 · #35de5f

Contrast

#355fde as textRatioAAAA largeAAAFix
Aaon white
5.46:1passpassfail
  • AAA: use #214bca as the text (7.18:1)
Aaon black
3.84:1failpassfail
  • AA: use #476de1 as the text (4.54:1)
  • AAA: use #7793e9 as the text (7.13:1)
  • AA: or shift the background to #ebebeb (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 #355fde as the background.

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/355fde-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