Color

#599fd9

#599fd9
hex#599fd9
rgbrgb(89, 159, 217)
hslhsl(207, 63%, 60%)
oklchoklch(0.681 0.112 245.5)
Closest name: Blue Bay (#619ad6)Relative luminance 0.3193

Colors that go with #599fd9

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 →

#d99359

#59d9d3 · #595fd9

#d9599f · #9fd959

Split-complementary

Open in tool →

#d9595f · #d9d359

#d359d9 · #d99359 · #5fd959

Contrast

#599fd9 as textRatioAAAA largeAAAFix
Aaon white
2.84:1failfailfail
  • AA: use #2a7abb as the text (4.57:1)
  • AAA: use #205c8d as the text (7.05:1)
  • AA: or shift the background to #303030 (4.64:1)
  • AAA: or shift the background to #080808 (7.04:1)
Aaon black
7.39:1passpasspassPasses 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 #599fd9 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

#599fd9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #599fd9
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 #599fd9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/599fd9-9cadc4-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