Color

#377fd2

#377fd2
hex#377fd2
rgbrgb(55, 127, 210)
hslhsl(212, 63%, 52%)
oklchoklch(0.592 0.146 254.1)
Closest name: Haddock’s Sweater (#277aba)Relative luminance 0.2064

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d28a37

#37cdd2 · #3d37d2

#d2377f · #7fd237

Split-complementary

Open in tool →

#d23d37 · #cdd237

#d237cd · #d28a37 · #37d23d

Contrast

#377fd2 as textRatioAAAA largeAAAFix
Aaon white
4.09:1failpassfail
  • AA: use #2d75c8 as the text (4.68:1)
  • AAA: use #225896 as the text (7.23:1)
  • AA: or shift the background to #121212 (4.58:1)
Aaon black
5.13:1passpassfail
  • AAA: use #619adb as the text (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #377fd2 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

#377fd2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #377fd2
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 #377fd2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/377fd2-9caac4-df564e-1f202d-e9f1f1?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