Color

#2f42bc

#2f42bc
hex#2f42bc
rgbrgb(47, 66, 188)
hslhsl(232, 60%, 46%)
oklchoklch(0.447 0.191 269.7)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0813

Colors that go with #2f42bc

Charcoal, Sea Green and Steel 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 →

#bca92f

#2f88bc · #632fbc

#bc2f42 · #42bc2f

Split-complementary

Open in tool →

#bc632f · #88bc2f

#bc2f88 · #bca92f · #2fbc63

Contrast

#2f42bc as textRatioAAAA largeAAAFix
Aaon white
8:1passpasspassPasses AAA — no fix needed.
Aaon black
2.63:1failfailfail
  • AA: use #5c6cd6 as the text (4.57:1)
  • AAA: use #8591e0 as the text (7.12:1)
  • AA: or shift the background to #c4c4c4 (4.58:1)
  • AAA: or shift the background to #f0f0f0 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2f42bc 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

#2f42bc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2f42bc
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 #2f42bc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2f42bc-9c9dc4-df864e-231f2d-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