Color

#3d54ae

#3d54ae
hex#3d54ae
rgbrgb(61, 84, 174)
hslhsl(228, 48%, 46%)
oklchoklch(0.478 0.146 269.4)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1039

Colors that go with #3d54ae

Charcoal, Sea Green 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 →

#ae973d

#3d8cae · #5f3dae

#ae3d54 · #54ae3d

Split-complementary

Open in tool →

#ae5f3d · #8cae3d

#ae3d8c · #ae973d · #3dae5f

Contrast

#3d54ae as textRatioAAAA largeAAAFix
Aaon white
6.82:1passpassfail
  • AAA: use #3c52aa as the text (7.05:1)
Aaon black
3.08:1failpassfail
  • AA: use #5d72c6 as the text (4.69:1)
  • AAA: use #8293d3 as the text (7.06:1)
  • AA: or shift the background to #d4d4d4 (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d54ae as the background.

Brands using this color

Fonts for this mood

#3d54ae reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d54ae
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 #3d54ae and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d54ae-9c9fc4-df7c4e-231f2d-e9eff1?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