Color

#25a1ef

#25a1ef
hex#25a1ef
rgbrgb(37, 161, 239)
hslhsl(203, 86%, 54%)
oklchoklch(0.681 0.154 243)
Closest name: Fresh Blue of Bel Air (#069af3)Relative luminance 0.3212

Colors that go with #25a1ef

Charcoal, Medium Sea Green and Tomato 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 →

#ef7225

#25efd7 · #253cef

#ef25a1 · #a1ef25

Split-complementary

Open in tool →

#ef253c · #efd725

#d725ef · #ef7225 · #3cef25

Contrast

#25a1ef as textRatioAAAA largeAAAFix
Aaon white
2.83:1failfailfail
  • AA: use #0e7abe as the text (4.62:1)
  • AAA: use #0b5c8e as the text (7.15:1)
  • AA: or shift the background to #303030 (4.67:1)
  • AAA: or shift the background to #080808 (7.08:1)
Aaon black
7.42:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #25a1ef as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#25a1ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #25a1ef
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 #25a1ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/25a1ef-9cb0c4-df4e5d-1f222d-e9f1f0?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