Color

#537ddf

#537ddf
hex#537ddf
rgbrgb(83, 125, 223)
hslhsl(222, 69%, 60%)
oklchoklch(0.608 0.156 264.7)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2183

Colors that go with #537ddf

Copper, Amber and Charcoal 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 →

#dfb553

#53c3df · #6f53df

#df537d · #7ddf53

Split-complementary

Open in tool →

#df6f53 · #c3df53

#df53c3 · #dfb553 · #53df6f

Contrast

#537ddf as textRatioAAAA largeAAAFix
Aaon white
3.91:1failpassfail
  • AA: use #4170dc as the text (4.59:1)
  • AAA: use #2351be as the text (7.02:1)
  • AA: or shift the background to #171717 (4.58:1)
Aaon black
5.37:1passpassfail
  • AAA: use #7194e5 as the text (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #537ddf 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

#537ddf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #537ddf
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 #537ddf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/537ddf-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