Color

#5370e4

#5370e4
hex#5370e4
rgbrgb(83, 112, 228)
hslhsl(228, 73%, 61%)
oklchoklch(0.585 0.179 269.6)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.1903

Colors that go with #5370e4

Charcoal, Crimson and Sea Green 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 →

#e4c753

#53b9e4 · #7f53e4

#e45370 · #70e453

Split-complementary

Open in tool →

#e47f53 · #b9e453

#e453b9 · #e4c753 · #53e47f

Contrast

#5370e4 as textRatioAAAA largeAAAFix
Aaon white
4.37:1failpassfail
  • AA: use #4f6ce3 as the text (4.58:1)
  • AAA: use #2246d8 as the text (7.15:1)
  • AA: or shift the background to #0a0a0a (4.53:1)
Aaon black
4.81:1passpassfail
  • AAA: use #7b91ea as the text (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5370e4 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

#5370e4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5370e4
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 #5370e4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5370e4-9c9fc4-df7c4e-231f2d-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