Color

#3a49bb

#3a49bb
hex#3a49bb
rgbrgb(58, 73, 187)
hslhsl(233, 53%, 48%)
oklchoklch(0.465 0.179 271.8)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0925

Colors that go with #3a49bb

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 →

#bbac3a

#3a8abb · #6b3abb

#bb3a49 · #49bb3a

Split-complementary

Open in tool →

#bb6b3a · #8abb3a

#bb3a8a · #bbac3a · #3abb6b

Contrast

#3a49bb as textRatioAAAA largeAAAFix
Aaon white
7.37:1passpasspassPasses AAA — no fix needed.
Aaon black
2.85:1failfailfail
  • AA: use #5f6cce as the text (4.52:1)
  • AAA: use #8690da as the text (7.02:1)
  • AA: or shift the background to #cccccc (4.59:1)
  • AAA: or shift the background to #fafafa (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 #3a49bb 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

#3a49bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a49bb
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 #3a49bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a49bb-9c9cc4-df884e-241f2d-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