Color

#509bd7

#509bd7
hex#509bd7
rgbrgb(80, 155, 215)
hslhsl(207, 63%, 58%)
oklchoklch(0.667 0.117 245)
Closest name: Blue Bay (#619ad6)Relative luminance 0.3005

Colors that go with #509bd7

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 →

#d78d50

#50d7d1 · #5057d7

#d7509b · #9bd750

Split-complementary

Open in tool →

#d75057 · #d7d150

#d150d7 · #d78d50 · #57d750

Contrast

#509bd7 as textRatioAAAA largeAAAFix
Aaon white
3:1failfailfail
  • AA: use #2a7abb as the text (4.57:1)
  • AAA: use #205c8d as the text (7.05:1)
  • AA: or shift the background to #2e2e2e (4.53:1)
  • AAA: or shift the background to #000000 (7.01:1)
Aaon black
7.01:1passpasspassPasses 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 #509bd7 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

#509bd7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #509bd7
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 #509bd7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/509bd7-9cadc4-df4e53-1f212d-e9f1f1?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