Color

#121fce

#121fce
hex#121fce
rgbrgb(18, 31, 206)
hslhsl(236, 84%, 44%)
oklchoklch(0.407 0.251 266.1)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0556

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cec212

#127dce · #6412ce

#ce121f · #1fce12

Split-complementary

Open in tool →

#ce6412 · #7dce12

#ce127d · #cec212 · #12ce64

Contrast

#121fce as textRatioAAAA largeAAAFix
Aaon white
9.94:1passpasspassPasses AAA — no fix needed.
Aaon black
2.11:1failfailfail
  • AA: use #5b65f1 as the text (4.58:1)
  • AAA: use #858cf4 as the text (7.05:1)
  • AA: or shift the background to #b0b0b0 (4.58:1)
  • AAA: or shift the background to #d9d9d9 (7.04:1)

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

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

mcpConnect your agent — build around #121fce
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #121fce and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/121fce-9e9cc4-df8f4e-241f2d-e9eef1?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