Color

#423c86

#423c86
hex#423c86
rgbrgb(66, 60, 134)
hslhsl(245, 38%, 38%)
oklchoklch(0.403 0.12 283.3)
Closest name: darkslateblue (#483d8b)Relative luminance 0.0611

Colors that go with #423c86

Charcoal, Steel 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 →

#80863c

#3c5b86 · #673c86

#86423c · #3c8642

Split-complementary

Open in tool →

#86673c · #5b863c

#863c5b · #80863c · #3c8667

Contrast

#423c86 as textRatioAAAA largeAAAFix
Aaon white
9.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.22:1failfailfail
  • AA: use #726bbd as the text (4.55:1)
  • AAA: use #948ecc as the text (7:1)
  • AA: or shift the background to #b3b3b3 (4.51:1)
  • AAA: or shift the background to #dedede (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #423c86 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

#423c86 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #423c86
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 #423c86 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/423c86-a49cc4-dfa54e-261f2d-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