Color

#3d8db3

#3d8db3
hex#3d8db3
rgbrgb(61, 141, 179)
hslhsl(199, 49%, 47%)
oklchoklch(0.61 0.096 232)
Closest name: Blue Moon (#3992a8)Relative luminance 0.233

Colors that go with #3d8db3

Charcoal, Copper and Amber 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 →

#b3623d

#3db39d · #3d53b3

#b33d8d · #8db33d

Split-complementary

Open in tool →

#b33d53 · #b39d3d

#9d3db3 · #b3623d · #53b33d

Contrast

#3d8db3 as textRatioAAAA largeAAAFix
Aaon white
3.71:1failpassfail
  • AA: use #377ea0 as the text (4.51:1)
  • AAA: use #285d76 as the text (7.2:1)
  • AA: or shift the background to #1c1c1c (4.59:1)
Aaon black
5.66:1passpassfail
  • AAA: use #509fc3 as the text (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d8db3 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

#3d8db3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d8db3
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 #3d8db3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d8db3-9cb3c4-df4e66-1f232d-e9f1f0?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