Color

#409fdd

#409fdd
hex#409fdd
rgbrgb(64, 159, 221)
hslhsl(204, 70%, 56%)
oklchoklch(0.674 0.127 241.1)
Closest name: Blue Burst (#309cd0)Relative luminance 0.3111

Colors that go with #409fdd

Charcoal, Peru 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 →

#dd7f40

#40ddce · #4050dd

#dd409f · #9fdd40

Split-complementary

Open in tool →

#dd4050 · #ddce40

#ce40dd · #dd7f40 · #50dd40

Contrast

#409fdd as textRatioAAAA largeAAAFix
Aaon white
2.91:1failfailfail
  • AA: use #207ab6 as the text (4.65:1)
  • AAA: use #185d8b as the text (7.05:1)
  • AA: or shift the background to #303030 (4.54:1)
  • AAA: or shift the background to #050505 (7.01:1)
Aaon black
7.22:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #409fdd 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

#409fdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #409fdd
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 #409fdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/409fdd-9cafc4-df4e5a-1f222d-e9f1f0?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