Color

#3b8ce8

#3b8ce8
hex#3b8ce8
rgbrgb(59, 140, 232)
hslhsl(212, 79%, 57%)
oklchoklch(0.635 0.159 253.9)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2551

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e8973b

#3be2e8 · #413be8

#e83b8c · #8ce83b

Split-complementary

Open in tool →

#e8413b · #e2e83b

#e83be2 · #e8973b · #3be841

Contrast

#3b8ce8 as textRatioAAAA largeAAAFix
Aaon white
3.44:1failpassfail
  • AA: use #1a74db as the text (4.6:1)
  • AAA: use #1357a4 as the text (7.17:1)
  • AA: or shift the background to #242424 (4.51:1)
Aaon black
6.1:1passpassfail
  • AAA: use #5299eb as the text (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3b8ce8 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

#3b8ce8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3b8ce8
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 #3b8ce8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b8ce8-9caac4-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