Color

#3d76e1

#3d76e1
hex#3d76e1
rgbrgb(61, 118, 225)
hslhsl(219, 73%, 56%)
oklchoklch(0.585 0.174 261.6)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.1939

Colors that go with #3d76e1

Charcoal, Crimson and Copper 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 →

#e1a73d

#3dc8e1 · #553de1

#e13d76 · #76e13d

Split-complementary

Open in tool →

#e1553d · #c8e13d

#e13dc8 · #e1a73d · #3de155

Contrast

#3d76e1 as textRatioAAAA largeAAAFix
Aaon white
4.31:1failpassfail
  • AA: use #3470df as the text (4.64:1)
  • AAA: use #1c52b5 as the text (7.18:1)
  • AA: or shift the background to #0d0d0d (4.51:1)
Aaon black
4.88:1passpassfail
  • AAA: use #6995e8 as the text (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d76e1 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

#3d76e1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d76e1
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 #3d76e1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d76e1-9ca5c4-df664e-211f2d-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