Color

#428abd

#428abd
hex#428abd
rgbrgb(66, 138, 189)
hslhsl(205, 48%, 50%)
oklchoklch(0.61 0.106 242.2)
Closest name: steelblue (#4682b4)Relative luminance 0.2301

Colors that go with #428abd

Charcoal, Copper 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.

Real palettes that use #428abd

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#bd7542

#42bdb3 · #424dbd

#bd428a · #8abd42

Split-complementary

Open in tool →

#bd424c · #bdb342

#b342bd · #bd7542 · #4dbd42

Contrast

#428abd as textRatioAAAA largeAAAFix
Aaon white
3.75:1failpassfail
  • AA: use #3c7caa as the text (4.51:1)
  • AAA: use #2c5b7d as the text (7.24:1)
  • AA: or shift the background to #1c1c1c (4.55:1)
Aaon black
5.6:1passpassfail
  • AAA: use #609cc7 as the text (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #428abd as the background.

Brands using this color

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

Fonts for this mood

#428abd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #428abd
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 #428abd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/428abd-9cafc4-df4e58-1f212d-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