Color

#91bbc5

#91bbc5
hex#91bbc5
rgbrgb(145, 187, 197)
hslhsl(192, 31%, 67%)
oklchoklch(0.765 0.047 213.9)
Closest name: Aquatic (#99c1cc)Relative luminance 0.4559

Colors that go with #91bbc5

Charcoal, Dark Salmon and Copper 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 #91bbc5

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c59b91

#91c5b5 · #91a0c5

#c591bb · #bbc591

Split-complementary

Open in tool →

#c591a0 · #c5b591

#b591c5 · #c59b91 · #a0c591

Contrast

#91bbc5 as textRatioAAAA largeAAAFix
Aaon white
2.08:1failfailfail
  • AA: use #487c89 as the text (4.65:1)
  • AAA: use #375e68 as the text (7.09:1)
  • AA: or shift the background to #454545 (4.62:1)
  • AAA: or shift the background to #292929 (7.01:1)
Aaon black
10.12:1passpasspassPasses 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 #91bbc5 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #91bbc5
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 #91bbc5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/91bbc5-a2b5be-df4e77-1f242d-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