Color

#2733b4

#2733b4
hex#2733b4
rgbrgb(39, 51, 180)
hslhsl(235, 64%, 43%)
oklchoklch(0.411 0.2 270)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0609

Colors that go with #2733b4

Charcoal, Sea Green 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 →

#b4a827

#2779b4 · #6227b4

#b42733 · #33b427

Split-complementary

Open in tool →

#b46227 · #79b427

#b42779 · #b4a827 · #27b462

Contrast

#2733b4 as textRatioAAAA largeAAAFix
Aaon white
9.46:1passpasspassPasses AAA — no fix needed.
Aaon black
2.22:1failfailfail
  • AA: use #606adc as the text (4.59:1)
  • AAA: use #868ee4 as the text (7:1)
  • AA: or shift the background to #b3b3b3 (4.51:1)
  • AAA: or shift the background to #dedede (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2733b4 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

#2733b4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2733b4
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 #2733b4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2733b4-9e9cc4-df8d4e-241f2d-e9eef1?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