Color

#373fae

#373fae
hex#373fae
rgbrgb(55, 63, 174)
hslhsl(236, 52%, 45%)
oklchoklch(0.434 0.174 273.4)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0742

Colors that go with #373fae

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 →

#aea637

#377bae · #6b37ae

#ae373f · #3fae37

Split-complementary

Open in tool →

#ae6b37 · #7bae37

#ae377b · #aea637 · #37ae6b

Contrast

#373fae as textRatioAAAA largeAAAFix
Aaon white
8.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.48:1failfailfail
  • AA: use #646bce as the text (4.54:1)
  • AAA: use #8b90da as the text (7.1:1)
  • AA: or shift the background to #bfbfbf (4.6:1)
  • AAA: or shift the background to #ebebeb (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #373fae 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

#373fae reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #373fae
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 #373fae and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/373fae-9e9cc4-df8f4e-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