Color

#03b5bf

#03b5bf
hex#03b5bf
rgbrgb(3, 181, 191)
hslhsl(183, 97%, 38%)
oklchoklch(0.704 0.119 201.8)
Closest name: lightseagreen (#20b2aa)Relative luminance 0.3683

Colors that go with #03b5bf

Charcoal, Denim and Dodger 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bf0c03

#03bf6a · #0358bf

#bf03b5 · #b5bf03

Split-complementary

Open in tool →

#bf0358 · #bf6a03

#6a03bf · #bf0c03 · #58bf03

Contrast

#03b5bf as textRatioAAAA largeAAAFix
Aaon white
2.51:1failfailfail
  • AA: use #028188 as the text (4.67:1)
  • AAA: use #026064 as the text (7.34:1)
  • AA: or shift the background to #383838 (4.67:1)
  • AAA: or shift the background to #171717 (7.14:1)
Aaon black
8.37:1passpasspassPasses 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 #03b5bf 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

#03b5bf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #03b5bf
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 #03b5bf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03b5bf-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