Color

#101c41

#101c41
hex#101c41
rgbrgb(16, 28, 65)
hslhsl(225, 60%, 16%)
oklchoklch(0.24 0.072 267.3)
Closest name: Nightwalker (#161d3b)Relative luminance 0.0132

Colors that go with #101c41

Charcoal, Dark Olive Green and Sea Green 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 →

#413510

#103541 · #1d1041

#41101d · #1d4110

Split-complementary

Open in tool →

#411d10 · #354110

#411035 · #413510 · #10411d

Contrast

#101c41 as textRatioAAAA largeAAAFix
Aaon white
16.61:1passpasspassPasses AAA — no fix needed.
Aaon black
1.26:1failfailfail
  • AA: use #5070d3 as the text (4.6:1)
  • AAA: use #7c95de as the text (7.21:1)
  • AA: or shift the background to #858585 (4.5:1)
  • AAA: or shift the background to #ababab (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #101c41 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#101c41 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #101c41
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 #101c41 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/101c41-9ca1c4-df754e-221f2d-e9eff1?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