Color

#154fef

#154fef
hex#154fef
rgbrgb(21, 79, 239)
hslhsl(224, 87%, 51%)
oklchoklch(0.51 0.245 264)
Closest name: C64 Blue (#003aff)Relative luminance 0.1198

Colors that go with #154fef

Charcoal, Crimson 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 →

#efb515

#15bcef · #4815ef

#ef154f · #4fef15

Split-complementary

Open in tool →

#ef4815 · #bcef15

#ef15bc · #efb515 · #15ef48

Contrast

#154fef as textRatioAAAA largeAAAFix
Aaon white
6.18:1passpassfail
Aaon black
3.4:1failpassfail
  • AA: use #3b6cf1 as the text (4.6:1)
  • AAA: use #7093f5 as the text (7.18:1)
  • AA: or shift the background to #dedede (4.6:1)

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

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/154fef-9ca2c4-df724e-221f2d-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