Color

#40658c

#40658c
hex#40658c
rgbrgb(64, 101, 140)
hslhsl(211, 37%, 40%)
oklchoklch(0.496 0.076 250.8)
Closest name: Admiral Blue (#50647f)Relative luminance 0.1229

Colors that go with #40658c

Charcoal, Sienna 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 →

#8c6740

#408a8c · #42408c

#8c4065 · #658c40

Split-complementary

Open in tool →

#8c4240 · #8a8c40

#8c408a · #8c6740 · #408c42

Contrast

#40658c as textRatioAAAA largeAAAFix
Aaon white
6.07:1passpassfail
  • AAA: use #3a5b7e as the text (7.05:1)
Aaon black
3.46:1failpassfail
  • AA: use #4d79a8 as the text (4.62:1)
  • AAA: use #779ac0 as the text (7.17:1)
  • AA: or shift the background to #dedede (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40658c as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#40658c reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40658c
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 #40658c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40658c-9cabc4-df534e-1f202d-e9f1f1?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