Color

#128fb5

#128fb5
hex#128fb5
rgbrgb(18, 143, 181)
hslhsl(194, 82%, 39%)
oklchoklch(0.606 0.112 225.9)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2311

Colors that go with #128fb5

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 →

#b53812

#12b58a · #123db5

#b5128f · #8fb512

Split-complementary

Open in tool →

#b5123d · #b58a12

#8a12b5 · #b53812 · #3db512

Contrast

#128fb5 as textRatioAAAA largeAAAFix
Aaon white
3.74:1failpassfail
  • AA: use #1080a2 as the text (4.53:1)
  • AAA: use #0c5f79 as the text (7.17:1)
  • AA: or shift the background to #1c1c1c (4.56:1)
Aaon black
5.62:1passpassfail
  • AAA: use #15a5d1 as the text (7.33:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #128fb5 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

#128fb5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #128fb5
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 #128fb5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/128fb5-9cb6c4-df4e72-1f242d-e9f1ef?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