Color

#28bbbd

#28bbbd
hex#28bbbd
rgbrgb(40, 187, 189)
hslhsl(181, 65%, 45%)
oklchoklch(0.721 0.115 196.3)
Closest name: Emerald Bliss (#4cbdac)Relative luminance 0.3967

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bd2b28

#28bd75 · #2870bd

#bd28bb · #bbbd28

Split-complementary

Open in tool →

#bd2870 · #bd7528

#7528bd · #bd2b28 · #70bd28

Contrast

#28bbbd as textRatioAAAA largeAAAFix
Aaon white
2.35:1failfailfail
  • AA: use #1c8182 as the text (4.65:1)
  • AAA: use #156061 as the text (7.3:1)
  • AA: or shift the background to #3d3d3d (4.62:1)
  • AAA: or shift the background to #1f1f1f (7.01:1)
Aaon black
8.93:1passpasspassPasses 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 #28bbbd as the background.

Brands using this color

Fonts for this mood

#28bbbd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #28bbbd
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #28bbbd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28bbbd-a2babe-d45992-1f272d-e9f1ed?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