Color

#15317a

#15317a
hex#15317a
rgbrgb(21, 49, 122)
hslhsl(223, 71%, 28%)
oklchoklch(0.342 0.129 264.5)
Closest name: Below the Surface (#0a2f7c)Relative luminance 0.0376

Colors that go with #15317a

Charcoal, Steel Blue 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 →

#7a5d15

#15647a · #2b157a

#7a1531 · #317a15

Split-complementary

Open in tool →

#7a2b15 · #647a15

#7a1564 · #7a5d15 · #157a2b

Contrast

#15317a as textRatioAAAA largeAAAFix
Aaon white
11.98:1passpasspassPasses AAA — no fix needed.
Aaon black
1.75:1failfailfail
  • AA: use #4370df as the text (4.62:1)
  • AAA: use #7394e7 as the text (7.12:1)
  • AA: or shift the background to #a1a1a1 (4.64:1)
  • AAA: or shift the background to #c7c7c7 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #15317a 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

#15317a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15317a
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 #15317a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15317a-9ca3c4-df704e-211f2d-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