Color

#45405e

#45405e
hex#45405e
rgbrgb(69, 64, 94)
hslhsl(250, 19%, 31%)
oklchoklch(0.389 0.051 291.5)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.0574

Colors that go with #45405e

Steel Blue, Teal 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 →

#595e40

#404a5e · #54405e

#5e4540 · #405e45

Split-complementary

Open in tool →

#5e5440 · #4a5e40

#5e404a · #595e40 · #405e54

Contrast

#45405e as textRatioAAAA largeAAAFix
Aaon white
9.78:1passpasspassPasses AAA — no fix needed.
Aaon black
2.15:1failfailfail
  • AA: use #78709e as the text (4.61:1)
  • AAA: use #9892b5 as the text (7.11:1)
  • AA: or shift the background to #b0b0b0 (4.51:1)
  • AAA: or shift the background to #dbdbdb (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #45405e as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #45405e
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 #45405e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/45405e-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