Color

#3d5276

#3d5276
hex#3d5276
rgbrgb(61, 82, 118)
hslhsl(218, 32%, 35%)
oklchoklch(0.438 0.065 260.8)
Closest name: Deep Indigo (#4c567a)Relative luminance 0.0833

Colors that go with #3d5276

Sea Green, Teal and Sienna 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 →

#76613d

#3d6e76 · #443d76

#763d52 · #52763d

Split-complementary

Open in tool →

#76443d · #6e763d

#763d6e · #76613d · #3d7644

Contrast

#3d5276 as textRatioAAAA largeAAAFix
Aaon white
7.87:1passpasspassPasses AAA — no fix needed.
Aaon black
2.67:1failfailfail
  • AA: use #5775a8 as the text (4.52:1)
  • AAA: use #8299bf as the text (7.26:1)
  • AA: or shift the background to #c4c4c4 (4.51:1)
  • AAA: or shift the background to #f2f2f2 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d5276 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #3d5276
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 #3d5276 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d5276-9ca6c4-df644e-201f2d-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