Color

#516ba9

#516ba9
hex#516ba9
rgbrgb(81, 107, 169)
hslhsl(222, 35%, 49%)
oklchoklch(0.536 0.103 265.8)
Closest name: Bellflower (#5d66aa)Relative luminance 0.1513

Colors that go with #516ba9

Charcoal, Sea Green and Amber 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 →

#a98e51

#5197a9 · #6351a9

#a9516b · #6ba951

Split-complementary

Open in tool →

#a96351 · #97a951

#a95197 · #a98e51 · #51a963

Contrast

#516ba9 as textRatioAAAA largeAAAFix
Aaon white
5.22:1passpassfail
  • AAA: use #42588a as the text (7.01:1)
Aaon black
4.03:1failpassfail
  • AA: use #5a73af as the text (4.51:1)
  • AAA: use #8396c3 as the text (7.12:1)
  • AA: or shift the background to #f0f0f0 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #516ba9 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

#516ba9 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #516ba9
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 #516ba9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/516ba9-9ca3c4-df6e4e-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