Color

#4287d7

#4287d7
hex#4287d7
rgbrgb(66, 135, 215)
hslhsl(212, 65%, 55%)
oklchoklch(0.617 0.14 253.8)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2339

Colors that go with #4287d7

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 →

#d79142

#42d2d7 · #4742d7

#d74287 · #87d742

Split-complementary

Open in tool →

#d74742 · #d2d742

#d742d2 · #d79142 · #42d747

Contrast

#4287d7 as textRatioAAAA largeAAAFix
Aaon white
3.7:1failpassfail
  • AA: use #2b75ca as the text (4.67:1)
  • AAA: use #205897 as the text (7.23:1)
  • AA: or shift the background to #1c1c1c (4.61:1)
Aaon black
5.68:1passpassfail
  • AAA: use #5f9add as the text (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4287d7 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

#4287d7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4287d7
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 #4287d7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4287d7-9caac4-df564e-1f202d-e9f1f1?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