Color

#1f12ab

#1f12ab
hex#1f12ab
rgbrgb(31, 18, 171)
hslhsl(245, 81%, 37%)
oklchoklch(0.357 0.218 270.5)
Closest name: Dark Galaxy (#0018a8)Relative luminance 0.0366

Colors that go with #1f12ab

Charcoal, Steel Blue and Cornflower 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 →

#9eab12

#1252ab · #6b12ab

#ab1f12 · #12ab1f

Split-complementary

Open in tool →

#ab6b12 · #52ab12

#ab1252 · #9eab12 · #12ab6b

Contrast

#1f12ab as textRatioAAAA largeAAAFix
Aaon white
12.12:1passpasspassPasses AAA — no fix needed.
Aaon black
1.73:1failfailfail
  • AA: use #6e62ef as the text (4.66:1)
  • AAA: use #948cf3 as the text (7.3:1)
  • AA: or shift the background to #9e9e9e (4.52:1)
  • AAA: or shift the background to #c7c7c7 (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f12ab 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

#1f12ab reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f12ab
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 #1f12ab and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f12ab-a49cc4-dfa54e-261f2d-e9ecf1?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