Color

#5751bd

#5751bd
hex#5751bd
rgbrgb(87, 81, 189)
hslhsl(243, 45%, 53%)
oklchoklch(0.501 0.164 281.2)
Closest name: slateblue (#6a5acd)Relative luminance 0.1159

Colors that go with #5751bd

Charcoal, Amber 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 →

#b8bd51

#5182bd · #8d51bd

#bd5751 · #51bd57

Split-complementary

Open in tool →

#bd8d51 · #82bd51

#bd5182 · #b8bd51 · #51bd8d

Contrast

#5751bd as textRatioAAAA largeAAAFix
Aaon white
6.33:1passpassfail
  • AAA: use #4c46b9 as the text (7.28:1)
Aaon black
3.32:1failpassfail
  • AA: use #706bc7 as the text (4.62:1)
  • AAA: use #9490d5 as the text (7.21:1)
  • AA: or shift the background to #dbdbdb (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5751bd 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

#5751bd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5751bd
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 #5751bd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5751bd-a39cc4-dfa04e-261f2d-e9edf1?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