Color

#2145d4

#2145d4
hex#2145d4
rgbrgb(33, 69, 212)
hslhsl(228, 73%, 48%)
oklchoklch(0.47 0.221 266.1)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0933

Colors that go with #2145d4

Charcoal, Sea Green 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 →

#d4b021

#219ed4 · #5721d4

#d42145 · #45d421

Split-complementary

Open in tool →

#d45721 · #9ed421

#d4219e · #d4b021 · #21d457

Contrast

#2145d4 as textRatioAAAA largeAAAFix
Aaon white
7.33:1passpasspassPasses AAA — no fix needed.
Aaon black
2.87:1failfailfail
  • AA: use #4f6ce3 as the text (4.59:1)
  • AAA: use #7b91ea as the text (7.08:1)
  • AA: or shift the background to #cccccc (4.56:1)
  • AAA: or shift the background to #fafafa (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 #2145d4 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2145d4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2145d4
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 #2145d4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2145d4-9c9fc4-df7c4e-231f2d-e9eff1?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