Color

#3f8bee

#3f8bee
hex#3f8bee
rgbrgb(63, 139, 238)
hslhsl(214, 84%, 59%)
oklchoklch(0.638 0.167 256.3)
Closest name: dodgerblue (#1e90ff)Relative luminance 0.257

Colors that go with #3f8bee

Charcoal, Crimson 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 →

#eea23f

#3fe3ee · #4a3fee

#ee3f8b · #8bee3f

Split-complementary

Open in tool →

#ee4a3f · #e3ee3f

#ee3fe3 · #eea23f · #3fee4a

Contrast

#3f8bee as textRatioAAAA largeAAAFix
Aaon white
3.42:1failpassfail
  • AA: use #1471eb as the text (4.57:1)
  • AAA: use #1056b2 as the text (7.01:1)
  • AA: or shift the background to #242424 (4.54:1)
Aaon black
6.14:1passpassfail
  • AAA: use #5699f0 as the text (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f8bee 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

#3f8bee reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f8bee
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 #3f8bee and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f8bee-9ca9c4-df5a4e-1f1f2d-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