Color

#1bb3bb

#1bb3bb
hex#1bb3bb
rgbrgb(27, 179, 187)
hslhsl(183, 75%, 42%)
oklchoklch(0.699 0.115 200.7)
Closest name: lightseagreen (#20b2aa)Relative luminance 0.3606

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bb231b

#1bbb73 · #1b63bb

#bb1bb3 · #b3bb1b

Split-complementary

Open in tool →

#bb1b63 · #bb731b

#731bbb · #bb231b · #63bb1b

Contrast

#1bb3bb as textRatioAAAA largeAAAFix
Aaon white
2.56:1failfailfail
  • AA: use #138086 as the text (4.71:1)
  • AAA: use #0f6267 as the text (7.09:1)
  • AA: or shift the background to #383838 (4.59:1)
  • AAA: or shift the background to #171717 (7.01:1)
Aaon black
8.21:1passpasspassPasses 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 #1bb3bb 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

#1bb3bb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1bb3bb
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 #1bb3bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1bb3bb-a2b9be-d4598e-1f262d-e9f1ee?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