Color

#1b658d

#1b658d
hex#1b658d
rgbrgb(27, 101, 141)
hslhsl(201, 68%, 33%)
oklchoklch(0.482 0.095 237.7)
Closest name: Blue Velvet (#0d6183)Relative luminance 0.1146

Colors that go with #1b658d

Charcoal, Crimson and Royal 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 →

#8d431b

#1b8d7c · #1b2c8d

#8d1b65 · #658d1b

Split-complementary

Open in tool →

#8d1b2c · #8d7c1b

#7c1b8d · #8d431b · #2c8d1b

Contrast

#1b658d as textRatioAAAA largeAAAFix
Aaon white
6.38:1passpassfail
  • AAA: use #185c81 as the text (7.27:1)
Aaon black
3.29:1failpassfail
  • AA: use #217eb0 as the text (4.68:1)
  • AAA: use #319ed8 as the text (7.01:1)
  • AA: or shift the background to #d9d9d9 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b658d as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#1b658d reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b658d
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 #1b658d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b658d-9cb1c4-df4e62-1f222d-e9f1f0?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