Color

#256acb

#256acb
hex#256acb
rgbrgb(37, 106, 203)
hslhsl(215, 69%, 47%)
oklchoklch(0.536 0.166 258)
Closest name: God of Rain (#4466cc)Relative luminance 0.1501

Colors that go with #256acb

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 →

#cb8625

#25bdcb · #3325cb

#cb256a · #6acb25

Split-complementary

Open in tool →

#cb3325 · #bdcb25

#cb25bd · #cb8625 · #25cb33

Contrast

#256acb as textRatioAAAA largeAAAFix
Aaon white
5.25:1passpassfail
  • AAA: use #1e56a4 as the text (7.19:1)
Aaon black
4:1failpassfail
  • AA: use #2c74d8 as the text (4.6:1)
  • AAA: use #6499e3 as the text (7.21:1)
  • AA: or shift the background to #f0f0f0 (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #256acb as the background.

Brands using this color

Fonts for this mood

#256acb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #256acb
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 #256acb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/256acb-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