Color

#5b9db3

#5b9db3
hex#5b9db3
rgbrgb(91, 157, 179)
hslhsl(195, 37%, 53%)
oklchoklch(0.66 0.075 221.6)
Closest name: Atlas Cedar (#5ca0a7)Relative luminance 0.2959

Colors that go with #5b9db3

Charcoal, Terracotta 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.

Real palettes that use #5b9db3

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b3715b

#5bb39d · #5b71b3

#b35b9d · #9db35b

Split-complementary

Open in tool →

#b35b71 · #b39d5b

#9d5bb3 · #b3715b · #71b35b

Contrast

#5b9db3 as textRatioAAAA largeAAAFix
Aaon white
3.04:1failpassfail
  • AA: use #427c8f as the text (4.65:1)
  • AAA: use #325e6c as the text (7.11:1)
  • AA: or shift the background to #2b2b2b (4.66:1)
Aaon black
6.92:1passpassfail
  • AAA: use #5e9fb5 as the text (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b9db3 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

#5b9db3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5b9db3
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 #5b9db3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b9db3-9cb5c4-df4e70-1f242d-e9f1ef?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