Color

#583786

#583786
hex#583786
rgbrgb(88, 55, 134)
hslhsl(265, 42%, 37%)
oklchoklch(0.416 0.128 300.2)
Closest name: darkslateblue (#483d8b)Relative luminance 0.0653

Colors that go with #583786

Charcoal, Royal Blue and 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 →

#658637

#373d86 · #7f3786

#865837 · #378658

Split-complementary

Open in tool →

#867f37 · #3d8637

#86373d · #658637 · #37867f

Contrast

#583786 as textRatioAAAA largeAAAFix
Aaon white
9.11:1passpasspassPasses AAA — no fix needed.
Aaon black
2.31:1failfailfail
  • AA: use #8a63bf as the text (4.62:1)
  • AAA: use #a588ce as the text (7.01:1)
  • AA: or shift the background to #b8b8b8 (4.59:1)
  • AAA: or shift the background to #e3e3e3 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #583786 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

#583786 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #583786
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 #583786 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/583786-b19cc4-dfd54e-2b1f2d-e9eaf1?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