Color

#2b7be3

#2b7be3
hex#2b7be3
rgbrgb(43, 123, 227)
hslhsl(214, 77%, 53%)
oklchoklch(0.591 0.176 256.8)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2023

Colors that go with #2b7be3

Charcoal, Crimson and Copper 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 →

#e3932b

#2bd7e3 · #372be3

#e32b7b · #7be32b

Split-complementary

Open in tool →

#e3372b · #d7e32b

#e32bd7 · #e3932b · #2be337

Contrast

#2b7be3 as textRatioAAAA largeAAAFix
Aaon white
4.16:1failpassfail
  • AA: use #1d72e2 as the text (4.61:1)
  • AAA: use #1657ac as the text (7.02:1)
  • AA: or shift the background to #121212 (4.5:1)
Aaon black
5.05:1passpassfail
  • AAA: use #5897e9 as the text (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b7be3 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

#2b7be3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b7be3
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 #2b7be3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b7be3-9ca9c4-df5a4e-1f1f2d-e9f0f1?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