Color

#3ab5bb

#3ab5bb
hex#3ab5bb
rgbrgb(58, 181, 187)
hslhsl(183, 53%, 48%)
oklchoklch(0.71 0.105 199.8)
Closest name: lightseagreen (#20b2aa)Relative luminance 0.3754

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bb403a

#3abb81 · #3a74bb

#bb3ab5 · #b5bb3a

Split-complementary

Open in tool →

#bb3a74 · #bb813a

#813abb · #bb403a · #74bb3a

Contrast

#3ab5bb as textRatioAAAA largeAAAFix
Aaon white
2.47:1failfailfail
  • AA: use #298085 as the text (4.65:1)
  • AAA: use #1f6265 as the text (7.02:1)
  • AA: or shift the background to #3b3b3b (4.54:1)
  • AAA: or shift the background to #1a1a1a (7.05:1)
Aaon black
8.51:1passpasspassPasses 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 #3ab5bb 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

#3ab5bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3ab5bb
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 #3ab5bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3ab5bb-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