Color

#3d39a2

#3d39a2
hex#3d39a2
rgbrgb(61, 57, 162)
hslhsl(242, 48%, 43%)
oklchoklch(0.417 0.164 278.2)
Closest name: Bluebell (#333399)Relative luminance 0.0653

Colors that go with #3d39a2

Charcoal, Sea Green and Steel 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.

Real palettes that use #3d39a2

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9fa239

#396aa2 · #7139a2

#a23d39 · #39a23d

Split-complementary

Open in tool →

#a27139 · #6aa239

#a2396a · #9fa239 · #39a271

Contrast

#3d39a2 as textRatioAAAA largeAAAFix
Aaon white
9.11:1passpasspassPasses AAA — no fix needed.
Aaon black
2.31:1failfailfail
  • AA: use #6f6ccb as the text (4.68:1)
  • AAA: use #908ed7 as the text (7.04:1)
  • AA: or shift the background to #b8b8b8 (4.59:1)
  • AAA: or shift the background to #e3e3e3 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d39a2 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

#3d39a2 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d39a2
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 #3d39a2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d39a2-a29cc4-df9e4e-261f2d-e9edf1?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