Color

#3570de

#3570de
hex#3570de
rgbrgb(53, 112, 222)
hslhsl(219, 72%, 54%)
oklchoklch(0.567 0.179 261.5)
Closest name: Royal Blue (#4169e1)Relative luminance 0.1762

Colors that go with #3570de

Charcoal, Crimson 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 →

#dea335

#35c5de · #4f35de

#de3570 · #70de35

Split-complementary

Open in tool →

#de4f35 · #c5de35

#de35c5 · #dea335 · #35de4f

Contrast

#3570de as textRatioAAAA largeAAAFix
Aaon white
4.64:1passpassfail
  • AAA: use #1d52b4 as the text (7.2:1)
Aaon black
4.52:1passpassfail
  • AAA: use #6a96e7 as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3570de 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

#3570de reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3570de
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 #3570de and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3570de-9ca5c4-df664e-211f2d-e9f0f1?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