Color

#15418a

#15418a
hex#15418a
rgbrgb(21, 65, 138)
hslhsl(217, 74%, 31%)
oklchoklch(0.391 0.131 260.2)
Closest name: Cascade Twilight (#234893)Relative luminance 0.0578

Colors that go with #15418a

Charcoal, Crimson and Steel 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.

Real palettes that use #15418a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a5d15

#157c8a · #22158a

#8a1541 · #418a15

Split-complementary

Open in tool →

#8a2215 · #7c8a15

#8a157c · #8a5d15 · #158a22

Contrast

#15418a as textRatioAAAA largeAAAFix
Aaon white
9.74:1passpasspassPasses AAA — no fix needed.
Aaon black
2.16:1failfailfail
  • AA: use #2e72e0 as the text (4.6:1)
  • AAA: use #6496e8 as the text (7.07:1)
  • AA: or shift the background to #b3b3b3 (4.65:1)
  • AAA: or shift the background to #dbdbdb (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #15418a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#15418a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15418a
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 #15418a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15418a-9ca7c4-df624e-201f2d-e9f0f1?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