Color

#646ae8

#646ae8
hex#646ae8
rgbrgb(100, 106, 232)
hslhsl(237, 74%, 65%)
oklchoklch(0.587 0.187 276.9)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.1884

Colors that go with #646ae8

Charcoal, Sea Green and Amber 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 →

#e8e164

#64ace8 · #9f64e8

#e8646a · #6ae864

Split-complementary

Open in tool →

#e89f64 · #ace864

#e864ac · #e8e164 · #64e89f

Contrast

#646ae8 as textRatioAAAA largeAAAFix
Aaon white
4.4:1failpassfail
  • AA: use #5f66e7 as the text (4.62:1)
  • AAA: use #3740e1 as the text (7.04:1)
  • AA: or shift the background to #080808 (4.55:1)
Aaon black
4.77:1passpassfail

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #646ae8 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

#646ae8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #646ae8
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 #646ae8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/646ae8-9f9cc4-df924e-251f2d-e9edf1?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