Color

#279fb4

#279fb4
hex#279fb4
rgbrgb(39, 159, 180)
hslhsl(189, 64%, 43%)
oklchoklch(0.649 0.104 212.5)
Closest name: Blue Ocean (#009dc4)Relative luminance 0.2852

Colors that go with #279fb4

Charcoal, Orange Red 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 #279fb4

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b43d27

#27b483 · #2759b4

#b4279f · #9fb427

Split-complementary

Open in tool →

#b42759 · #b48327

#8327b4 · #b43d27 · #59b427

Contrast

#279fb4 as textRatioAAAA largeAAAFix
Aaon white
3.13:1failpassfail
  • AA: use #208192 as the text (4.55:1)
  • AAA: use #18606d as the text (7.16:1)
  • AA: or shift the background to #2b2b2b (4.52:1)
Aaon black
6.7:1passpassfail
  • AAA: use #29a6bc as the text (7.27:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #279fb4 as the background.

Brands using this color

Fonts for this mood

#279fb4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #279fb4
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 #279fb4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/279fb4-a2b7be-df4e7e-1f252d-e9f1ee?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