Color

#3b19fa

#3b19fa
hex#3b19fa
rgbrgb(59, 25, 250)
hslhsl(249, 96%, 54%)
oklchoklch(0.474 0.29 272.6)
Closest name: Blustering Blue (#4411ff)Relative luminance 0.0853

Colors that go with #3b19fa

Charcoal, Cobalt Blue and Cornflower 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 →

#d9fa19

#1968fa · #ab19fa

#fa3b19 · #19fa3b

Split-complementary

Open in tool →

#faab19 · #68fa19

#fa1968 · #d9fa19 · #19faab

Contrast

#3b19fa as textRatioAAAA largeAAAFix
Aaon white
7.76:1passpasspassPasses AAA — no fix needed.
Aaon black
2.71:1failfailfail
  • AA: use #725afc as the text (4.58:1)
  • AAA: use #9987fd as the text (7.24:1)
  • AA: or shift the background to #c7c7c7 (4.59:1)
  • AAA: or shift the background to #f5f5f5 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3b19fa 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

#3b19fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3b19fa
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 #3b19fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b19fa-a79cc4-dfae4e-271f2d-e9ecf1?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