Color

#121ab5

#121ab5
hex#121ab5
rgbrgb(18, 26, 181)
hslhsl(237, 82%, 39%)
oklchoklch(0.371 0.227 266.7)
Closest name: Dark Galaxy (#0018a8)Relative luminance 0.042

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b5ad12

#126cb5 · #5b12b5

#b5121a · #1ab512

Split-complementary

Open in tool →

#b55b12 · #6cb512

#b5126c · #b5ad12 · #12b55b

Contrast

#121ab5 as textRatioAAAA largeAAAFix
Aaon white
11.41:1passpasspassPasses AAA — no fix needed.
Aaon black
1.84:1failfailfail
  • AA: use #5d64ef as the text (4.53:1)
  • AAA: use #868cf3 as the text (7.06:1)
  • AA: or shift the background to #a3a3a3 (4.52:1)
  • AAA: or shift the background to #cccccc (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 #121ab5 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

#121ab5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #121ab5
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 #121ab5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/121ab5-9f9cc4-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