Color

#12eff3

#12eff3
hex#12eff3
rgbrgb(18, 239, 243)
hslhsl(181, 90%, 51%)
oklchoklch(0.864 0.146 197)
Closest name: Aqua (#0ff0fe)Relative luminance 0.6833

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f31512

#12f386 · #127ef3

#f312ef · #eff312

Split-complementary

Open in tool →

#f3127e · #f38612

#8612f3 · #f31512 · #7ef312

Contrast

#12eff3 as textRatioAAAA largeAAAFix
Aaon white
1.43:1failfailfail
  • AA: use #078183 as the text (4.69:1)
  • AAA: use #055f61 as the text (7.46:1)
  • AA: or shift the background to #5e5e5e (4.53:1)
  • AAA: or shift the background to #424242 (7.02:1)
Aaon black
14.67:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #12eff3 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

#12eff3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #12eff3
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 #12eff3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/12eff3-a2babe-d45992-1f272d-e9f1ed?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