Color

#121bca

#121bca
hex#121bca
rgbrgb(18, 27, 202)
hslhsl(237, 84%, 43%)
oklchoklch(0.399 0.249 266.2)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0518

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cac112

#1277ca · #6412ca

#ca121b · #1bca12

Split-complementary

Open in tool →

#ca6412 · #77ca12

#ca1277 · #cac112 · #12ca64

Contrast

#121bca as textRatioAAAA largeAAAFix
Aaon white
10.32:1passpasspassPasses AAA — no fix needed.
Aaon black
2.04:1failfailfail
  • AA: use #5f67f1 as the text (4.7:1)
  • AAA: use #8a8ff5 as the text (7.33:1)
  • AA: or shift the background to #adadad (4.6:1)
  • AAA: or shift the background to #d6d6d6 (7.1:1)

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

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

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

tool url/palettes/new/121bca-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