Color

#121cde

#121cde
hex#121cde
rgbrgb(18, 28, 222)
hslhsl(237, 85%, 47%)
oklchoklch(0.425 0.27 265.8)
Closest name: Brutally Blue (#0022dd)Relative luminance 0.0623

Colors that go with #121cde

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ded412

#1282de · #6e12de

#de121c · #1cde12

Split-complementary

Open in tool →

#de6e12 · #82de12

#de1282 · #ded412 · #12de6e

Contrast

#121cde as textRatioAAAA largeAAAFix
Aaon white
9.35:1passpasspassPasses AAA — no fix needed.
Aaon black
2.25:1failfailfail
  • AA: use #5f66f2 as the text (4.67:1)
  • AAA: use #898ef5 as the text (7.25:1)
  • AA: or shift the background to #b5b5b5 (4.56:1)
  • AAA: or shift the background to #e0e0e0 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #121cde 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

#121cde reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #121cde
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 #121cde and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/121cde-9f9cc4-df924e-251f2d-e9edf1?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