Color

#3b87de

#3b87de
hex#3b87de
rgbrgb(59, 135, 222)
hslhsl(212, 71%, 55%)
oklchoklch(0.618 0.152 254)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2353

Colors that go with #3b87de

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 →

#de923b

#3bd8de · #403bde

#de3b87 · #87de3b

Split-complementary

Open in tool →

#de403b · #d8de3b

#de3bd8 · #de923b · #3bde40

Contrast

#3b87de as textRatioAAAA largeAAAFix
Aaon white
3.68:1failpassfail
  • AA: use #2375d1 as the text (4.63:1)
  • AAA: use #1b579d as the text (7.25:1)
  • AA: or shift the background to #1c1c1c (4.63:1)
Aaon black
5.71:1passpassfail
  • AAA: use #599ae3 as the text (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3b87de 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

#3b87de reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3b87de
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 #3b87de and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b87de-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