Color

#356fe3

#356fe3
hex#356fe3
rgbrgb(53, 111, 227)
hslhsl(220, 76%, 55%)
oklchoklch(0.569 0.187 262.2)
Closest name: royalblue (#4169e1)Relative luminance 0.1767

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#e3a935

#35c6e3 · #5235e3

#e3356f · #6fe335

Split-complementary

Open in tool →

#e35235 · #c6e335

#e335c6 · #e3a935 · #35e352

Contrast

#356fe3 as textRatioAAAA largeAAAFix
Aaon white
4.63:1passpassfail
  • AAA: use #1a50bc as the text (7.2:1)
Aaon black
4.53:1passpassfail
  • AAA: use #6b96eb as the text (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #356fe3 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

#356fe3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #356fe3
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #356fe3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/356fe3-9ca5c4-df694e-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