Color

#3918dc

#3918dc
hex#3918dc
rgbrgb(57, 24, 220)
hslhsl(250, 80%, 48%)
oklchoklch(0.437 0.261 274.4)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0669

Colors that go with #3918dc

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 →

#bcdc18

#185adc · #9b18dc

#dc3918 · #18dc39

Split-complementary

Open in tool →

#dc9b18 · #5adc18

#dc185a · #bcdc18 · #18dc9b

Contrast

#3918dc as textRatioAAAA largeAAAFix
Aaon white
8.98:1passpasspassPasses AAA — no fix needed.
Aaon black
2.34:1failfailfail
  • AA: use #765eed as the text (4.59:1)
  • AAA: use #9988f2 as the text (7.16:1)
  • AA: or shift the background to #b8b8b8 (4.53:1)
  • AAA: or shift the background to #e6e6e6 (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3918dc 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

#3918dc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3918dc
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 #3918dc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3918dc-a79cc4-dfb14e-281f2d-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