Color

#2a37cb

#2a37cb
hex#2a37cb
rgbrgb(42, 55, 203)
hslhsl(235, 66%, 48%)
oklchoklch(0.442 0.223 269.5)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0754

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cbbe2a

#2a88cb · #6d2acb

#cb2a37 · #37cb2a

Split-complementary

Open in tool →

#cb6d2a · #88cb2a

#cb2a88 · #cbbe2a · #2acb6d

Contrast

#2a37cb as textRatioAAAA largeAAAFix
Aaon white
8.38:1passpasspassPasses AAA — no fix needed.
Aaon black
2.51:1failfailfail
  • AA: use #5e69de as the text (4.55:1)
  • AAA: use #8890e7 as the text (7.19:1)
  • AA: or shift the background to #bfbfbf (4.55:1)
  • AAA: or shift the background to #ebebeb (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 #2a37cb 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

#2a37cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a37cb
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #2a37cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a37cb-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