Color

#21415e

#21415e
hex#21415e
rgbrgb(33, 65, 94)
hslhsl(209, 48%, 25%)
oklchoklch(0.365 0.063 247.7)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0491

Colors that go with #21415e

Teal, Sienna 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 →

#5e3f21

#215e5d · #21225e

#5e2141 · #415e21

Split-complementary

Open in tool →

#5e2122 · #5e5d21

#5d215e · #5e3f21 · #225e21

Contrast

#21415e as textRatioAAAA largeAAAFix
Aaon white
10.59:1passpasspassPasses AAA — no fix needed.
Aaon black
1.98:1failfailfail
  • AA: use #3e7ab1 as the text (4.62:1)
  • AAA: use #689bca as the text (7.13:1)
  • AA: or shift the background to #ababab (4.61:1)
  • AAA: or shift the background to #d4d4d4 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21415e as the background.

Brands using this color

Fonts for this mood

#21415e reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21415e
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 #21415e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21415e-9cacc4-df4e4e-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