Color

#218fba

#218fba
hex#218fba
rgbrgb(33, 143, 186)
hslhsl(197, 70%, 43%)
oklchoklch(0.611 0.113 230.2)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2351

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ba4c21

#21ba99 · #2142ba

#ba218f · #8fba21

Split-complementary

Open in tool →

#ba2142 · #ba9921

#9921ba · #ba4c21 · #42ba21

Contrast

#218fba as textRatioAAAA largeAAAFix
Aaon white
3.68:1failpassfail
  • AA: use #1d7ea5 as the text (4.59:1)
  • AAA: use #155d79 as the text (7.31:1)
  • AA: or shift the background to #1c1c1c (4.63:1)
Aaon black
5.7:1passpassfail
  • AAA: use #25a0d0 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 #218fba as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#218fba reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #218fba
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 #218fba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/218fba-9cb4c4-df4e6b-1f232d-e9f1ef?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