Color

#3b83ba

#3b83ba
hex#3b83ba
rgbrgb(59, 131, 186)
hslhsl(206, 52%, 48%)
oklchoklch(0.589 0.111 244.5)
Closest name: steelblue (#4682b4)Relative luminance 0.2071

Colors that go with #3b83ba

Charcoal, Copper and Amber 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 →

#ba723b

#3bbab2 · #3b43ba

#ba3b83 · #83ba3b

Split-complementary

Open in tool →

#ba3b43 · #bab23b

#b23bba · #ba723b · #43ba3b

Contrast

#3b83ba as textRatioAAAA largeAAAFix
Aaon white
4.08:1failpassfail
  • AA: use #377bae as the text (4.56:1)
  • AAA: use #2a5d84 as the text (7.01:1)
  • AA: or shift the background to #141414 (4.51:1)
Aaon black
5.14:1passpassfail
  • AAA: use #5c9bcc 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 #3b83ba 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

#3b83ba reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3b83ba
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 #3b83ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b83ba-9caec4-df4e56-1f212d-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