Color

#4580d3

#4580d3
hex#4580d3
rgbrgb(69, 128, 211)
hslhsl(215, 62%, 55%)
oklchoklch(0.6 0.141 257.3)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2141

Colors that go with #4580d3

Charcoal, Copper 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 →

#d39845

#45c8d3 · #5145d3

#d34580 · #80d345

Split-complementary

Open in tool →

#d35145 · #c8d345

#d345c8 · #d39845 · #45d351

Contrast

#4580d3 as textRatioAAAA largeAAAFix
Aaon white
3.98:1failpassfail
  • AA: use #3575d0 as the text (4.56:1)
  • AAA: use #25579d as the text (7.17:1)
  • AA: or shift the background to #171717 (4.51:1)
Aaon black
5.28:1passpassfail
  • AAA: use #6697db as the text (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4580d3 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

#4580d3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4580d3
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 #4580d3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4580d3-9ca8c4-df5d4e-201f2d-e9f0f1?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