Color

#154cc1

#154cc1
hex#154cc1
rgbrgb(21, 76, 193)
hslhsl(221, 80%, 42%)
oklchoklch(0.462 0.192 262.6)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0918

Colors that go with #154cc1

Charcoal, Crimson 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 →

#c18b15

#15a1c1 · #3515c1

#c1154c · #4cc115

Split-complementary

Open in tool →

#c13515 · #a1c115

#c115a1 · #c18b15 · #15c135

Contrast

#154cc1 as textRatioAAAA largeAAAFix
Aaon white
7.41:1passpasspassPasses AAA — no fix needed.
Aaon black
2.84:1failfailfail
  • AA: use #356ee9 as the text (4.56:1)
  • AAA: use #6c95ef as the text (7.18:1)
  • AA: or shift the background to #cccccc (4.61:1)
  • AAA: or shift the background to #fafafa (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 #154cc1 as the background.

Brands using this color

Fonts for this mood

#154cc1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #154cc1
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 #154cc1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/154cc1-9ca4c4-df6b4e-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