Color

#1645bb

#1645bb
hex#1645bb
rgbrgb(22, 69, 187)
hslhsl(223, 79%, 41%)
oklchoklch(0.443 0.192 263.7)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0801

Colors that go with #1645bb

Charcoal, Steel Blue and Amber 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 →

#bb8c16

#1697bb · #3a16bb

#bb1645 · #45bb16

Split-complementary

Open in tool →

#bb3a16 · #97bb16

#bb1697 · #bb8c16 · #16bb3a

Contrast

#1645bb as textRatioAAAA largeAAAFix
Aaon white
8.07:1passpasspassPasses AAA — no fix needed.
Aaon black
2.6:1failfailfail
  • AA: use #3f6fe9 as the text (4.66:1)
  • AAA: use #7295ee as the text (7.25:1)
  • AA: or shift the background to #c2c2c2 (4.53:1)
  • AAA: or shift the background to #f0f0f0 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1645bb as the background.

Brands using this color

Fonts for this mood

#1645bb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1645bb
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 #1645bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1645bb-9ca3c4-df704e-211f2d-e9eff1?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