Color

#10da21

#10da21
hex#10da21
rgbrgb(16, 218, 33)
hslhsl(125, 86%, 46%)
oklchoklch(0.771 0.254 143.1)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5036

Colors that go with #10da21

Taupe, Violet and Hot Pink 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 →

#da10c9

#64da10 · #10da86

#2110da · #da2110

Split-complementary

Open in tool →

#8610da · #da1064

#1064da · #da10c9 · #da8610

Contrast

#10da21 as textRatioAAAA largeAAAFix
Aaon white
1.9:1failfailfail
  • AA: use #0a8a15 as the text (4.51:1)
  • AAA: use #086810 as the text (7:1)
  • AA: or shift the background to #4a4a4a (4.67:1)
  • AAA: or shift the background to #2e2e2e (7.16:1)
Aaon black
11.07:1passpasspassPasses 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 #10da21 as the background.

Brands using this color

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

mcpConnect your agent — build around #10da21
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 #10da21 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/10da21-a2bea7-a54edf-1f2d26-ecf1e9?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