Color

#15436a

#15436a
hex#15436a
rgbrgb(21, 67, 106)
hslhsl(208, 67%, 25%)
oklchoklch(0.373 0.083 248)
Closest name: Aegean Blue (#1b416f)Relative luminance 0.0521

Colors that go with #15436a

Crimson, 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 →

#6a3d15

#156a68 · #15186a

#6a1543 · #436a15

Split-complementary

Open in tool →

#6a1518 · #6a6815

#68156a · #6a3d15 · #186a15

Contrast

#15436a as textRatioAAAA largeAAAFix
Aaon white
10.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.04:1failfailfail
  • AA: use #2678c0 as the text (4.53:1)
  • AAA: use #509bdc as the text (7.06:1)
  • AA: or shift the background to #adadad (4.58:1)
  • AAA: or shift the background to #d6d6d6 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #15436a as the background.

Brands using this color

Fonts for this mood

#15436a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15436a
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 #15436a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15436a-9cadc4-df4e51-1f212d-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