Color

#2501ef

#2501ef
hex#2501ef
rgbrgb(37, 1, 239)
hslhsl(249, 99%, 47%)
oklchoklch(0.44 0.292 268.5)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0665

Colors that go with #2501ef

Olive Green, Charcoal and Slate Gray 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 →

#cbef01

#0154ef · #9b01ef

#ef2501 · #01ef25

Split-complementary

Open in tool →

#ef9b01 · #54ef01

#ef0154 · #cbef01 · #01ef9b

Contrast

#2501ef as textRatioAAAA largeAAAFix
Aaon white
9.02:1passpasspassPasses AAA — no fix needed.
Aaon black
2.33:1failfailfail
  • AA: use #7158fe as the text (4.53:1)
  • AAA: use #9785fe as the text (7.1:1)
  • AA: or shift the background to #b8b8b8 (4.54:1)
  • AAA: or shift the background to #e3e3e3 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2501ef 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

#2501ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2501ef
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 #2501ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2501ef-a79cc4-dfae4e-271f2d-e9ecf1?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