Color

#28c8b3

#28c8b3
hex#28c8b3
rgbrgb(40, 200, 179)
hslhsl(172, 67%, 47%)
oklchoklch(0.75 0.128 181.3)
Closest name: Cockatoo (#58c8b6)Relative luminance 0.4501

Colors that go with #28c8b3

Charcoal, Blue and Royal Blue 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 #28c8b3

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c8283d

#28c862 · #288dc8

#b328c8 · #c8b328

Split-complementary

Open in tool →

#c8288d · #c86228

#6228c8 · #c8283d · #8dc828

Contrast

#28c8b3 as textRatioAAAA largeAAAFix
Aaon white
2.1:1failfailfail
  • AA: use #1a8476 as the text (4.56:1)
  • AAA: use #136257 as the text (7.21:1)
  • AA: or shift the background to #454545 (4.57:1)
  • AAA: or shift the background to #262626 (7.21:1)
Aaon black
10:1passpasspassPasses 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 #28c8b3 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 #28c8b3
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 #28c8b3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28c8b3-a2bebe-d459a5-1f292d-e9f1ec?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