brandsweets

Color

#1901f4

#1901f4
hex#1901f4
rgbrgb(25, 1, 244)
hslhsl(246, 99%, 48%)
oklchoklch(0.442 0.299 266.3)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0676
CoolVividTechnicalModern
Open in palette toolCheck contrastWhat goes with it ↓

Colors that go with #1901f4

Charcoal, Crimson and Cobalt Blue 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.

Real palettes that use #1901f4

Activision· brandAlaska Airlines· brandBBC· brandBinance· brand

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →
1901f4dbf401

#dbf401

Analogous

Open in tool →
1901f40162f49301f4

#0162f4 · #9301f4

Triadic

Open in tool →
1901f4f4190101f419

#f41901 · #01f419

Split-complementary

Open in tool →
1901f4f4930162f401

#f49301 · #62f401

Tetradic

Open in tool →
1901f4f40162dbf40101f493

#f40162 · #dbf401 · #01f493

Contrast

#1901f4 as textRatioAAAA largeAAAFix
Aaon white
8.93:1passpasspassPasses AAA — no fix needed.
Aaon black
2.35:1failfailfail
  • AA: use #6d5dfe as the text (4.65:1)
  • AAA: use #968afe as the text (7.36:1)
  • AA: or shift the background to #b8b8b8 (4.5:1)
  • AAA: or shift the background to #e6e6e6 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1901f4 as the background.

Brands using this color

Fonts for this mood

#1901f4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →
mcpConnect your agent — build around #1901f4
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 #1901f4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1901f4-a59cc4-dfa74e-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