Color

#5b9cdc

#5b9cdc
hex#5b9cdc
rgbrgb(91, 156, 220)
hslhsl(210, 65%, 61%)
oklchoklch(0.677 0.117 249.6)
Closest name: Blue Bay (#619ad6)Relative luminance 0.3117

Colors that go with #5b9cdc

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 →

#dc9c5b

#5bdcdc · #5b5bdc

#dc5b9c · #9cdc5b

Split-complementary

Open in tool →

#dc5b5b · #dcdc5b

#dc5bdc · #dc9c5b · #5bdc5b

Contrast

#5b9cdc as textRatioAAAA largeAAAFix
Aaon white
2.9:1failfailfail
  • AA: use #2a78c6 as the text (4.56:1)
  • AAA: use #1f5993 as the text (7.22:1)
  • AA: or shift the background to #303030 (4.55:1)
  • AAA: or shift the background to #050505 (7.02:1)
Aaon black
7.23:1passpasspassPasses 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 #5b9cdc 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

#5b9cdc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5b9cdc
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 #5b9cdc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b9cdc-9cabc4-df514e-1f202d-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