Color

#3d7dd1

#3d7dd1
hex#3d7dd1
rgbrgb(61, 125, 209)
hslhsl(214, 62%, 53%)
oklchoklch(0.589 0.145 256.2)
Closest name: Haddock’s Sweater (#277aba)Relative luminance 0.2026

Colors that go with #3d7dd1

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 →

#d1913d

#3dc8d1 · #473dd1

#d13d7d · #7dd13d

Split-complementary

Open in tool →

#d1473d · #c8d13d

#d13dc8 · #d1913d · #3dd147

Contrast

#3d7dd1 as textRatioAAAA largeAAAFix
Aaon white
4.16:1failpassfail
  • AA: use #3075cf as the text (4.59:1)
  • AAA: use #25599d as the text (7.01:1)
  • AA: or shift the background to #121212 (4.51:1)
Aaon black
5.05:1passpassfail
  • AAA: use #6699db as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d7dd1 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

#3d7dd1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d7dd1
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 #3d7dd1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d7dd1-9ca9c4-df5a4e-1f1f2d-e9f0f1?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