Color

#154fbc

#154fbc
hex#154fbc
rgbrgb(21, 79, 188)
hslhsl(219, 80%, 41%)
oklchoklch(0.463 0.182 261.6)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0938

Colors that go with #154fbc

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 →

#bc8215

#15a3bc · #2e15bc

#bc154f · #4fbc15

Split-complementary

Open in tool →

#bc2e15 · #a3bc15

#bc15a3 · #bc8215 · #15bc2e

Contrast

#154fbc as textRatioAAAA largeAAAFix
Aaon white
7.3:1passpasspassPasses AAA — no fix needed.
Aaon black
2.88:1failfailfail
  • AA: use #2c6ee8 as the text (4.5:1)
  • AAA: use #6897ee as the text (7.25:1)
  • AA: or shift the background to #cccccc (4.55:1)
  • AAA: or shift the background to #fcfcfc (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #154fbc as the background.

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/154fbc-9ca5c4-df664e-211f2d-e9f0f1?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