Color

#3141a5

#3141a5
hex#3141a5
rgbrgb(49, 65, 165)
hslhsl(232, 54%, 42%)
oklchoklch(0.426 0.161 270.9)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0715

Colors that go with #3141a5

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a59631

#317ba5 · #5c31a5

#a53141 · #41a531

Split-complementary

Open in tool →

#a55c31 · #7ba531

#a5317b · #a59631 · #31a55c

Contrast

#3141a5 as textRatioAAAA largeAAAFix
Aaon white
8.64:1passpasspassPasses AAA — no fix needed.
Aaon black
2.43:1failfailfail
  • AA: use #5e6dcf as the text (4.56:1)
  • AAA: use #8591db as the text (7.07:1)
  • AA: or shift the background to #bdbdbd (4.6:1)
  • AAA: or shift the background to #e8e8e8 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3141a5 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

#3141a5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3141a5
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 #3141a5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3141a5-9c9dc4-df864e-231f2d-e9eef1?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