Color

#41738b

#41738b
hex#41738b
rgbrgb(65, 115, 139)
hslhsl(199, 36%, 40%)
oklchoklch(0.53 0.066 230.6)
Closest name: Calypso (#3d7188)Relative luminance 0.1525

Colors that go with #41738b

Charcoal, Royal Blue and Sienna 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.

Real palettes that use #41738b

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#8b5941

#418b7d · #414f8b

#8b4173 · #738b41

Split-complementary

Open in tool →

#8b414f · #8b7d41

#7d418b · #8b5941 · #4f8b41

Contrast

#41738b as textRatioAAAA largeAAAFix
Aaon white
5.19:1passpassfail
  • AAA: use #345c6f as the text (7.23:1)
Aaon black
4.05:1failpassfail
  • AA: use #467c95 as the text (4.58:1)
  • AAA: use #669eb7 as the text (7.14:1)
  • AA: or shift the background to #f0f0f0 (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #41738b 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

#41738b reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #41738b
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 #41738b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/41738b-9cb3c4-df4e66-1f232d-e9f1f0?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