Color

#515db8

#515db8
hex#515db8
rgbrgb(81, 93, 184)
hslhsl(233, 42%, 52%)
oklchoklch(0.516 0.142 274.6)
Closest name: God of Rain (#4466cc)Relative luminance 0.1304

Colors that go with #515db8

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 →

#b8ac51

#5191b8 · #7951b8

#b8515d · #5db851

Split-complementary

Open in tool →

#b87951 · #91b851

#b85191 · #b8ac51 · #51b879

Contrast

#515db8 as textRatioAAAA largeAAAFix
Aaon white
5.82:1passpassfail
  • AAA: use #4450a7 as the text (7.12:1)
Aaon black
3.61:1failpassfail
  • AA: use #636ebf as the text (4.51:1)
  • AAA: use #8b93d0 as the text (7.18:1)
  • AA: or shift the background to #e3e3e3 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #515db8 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

#515db8 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #515db8
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 #515db8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/515db8-9c9cc4-df884e-241f2d-e9eef1?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