Color

#357de9

#357de9
hex#357de9
rgbrgb(53, 125, 233)
hslhsl(216, 80%, 56%)
oklchoklch(0.602 0.179 258.7)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2131

Colors that go with #357de9

Charcoal, Crimson and Copper 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 →

#e9a135

#35d7e9 · #4735e9

#e9357d · #7de935

Split-complementary

Open in tool →

#e94735 · #d7e935

#e935d7 · #e9a135 · #35e947

Contrast

#357de9 as textRatioAAAA largeAAAFix
Aaon white
3.99:1failpassfail
  • AA: use #2371e7 as the text (4.58:1)
  • AAA: use #1454b3 as the text (7.12:1)
  • AA: or shift the background to #141414 (4.62:1)
Aaon black
5.26:1passpassfail
  • AAA: use #5e97ed 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 #357de9 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

#357de9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #357de9
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 #357de9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/357de9-9ca7c4-df5f4e-201f2d-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