Color

#509ddc

#509ddc
hex#509ddc
rgbrgb(80, 157, 220)
hslhsl(207, 67%, 59%)
oklchoklch(0.674 0.121 245.6)
Closest name: Blue Bay (#619ad6)Relative luminance 0.3099

Colors that go with #509ddc

Charcoal, Medium Sea Green and Peru 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 →

#dc8f50

#50dcd5 · #5057dc

#dc509d · #9ddc50

Split-complementary

Open in tool →

#dc5057 · #dcd550

#d550dc · #dc8f50 · #57dc50

Contrast

#509ddc as textRatioAAAA largeAAAFix
Aaon white
2.92:1failfailfail
  • AA: use #267ac0 as the text (4.54:1)
  • AAA: use #1c5a8d as the text (7.25:1)
  • AA: or shift the background to #303030 (4.52:1)
  • AAA: or shift the background to #030303 (7.07:1)
Aaon black
7.2:1passpasspassPasses 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 #509ddc 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

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

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

tool url/palettes/new/509ddc-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