Color
#a3ef1f
#a3ef1frgb(163, 239, 31)hsl(82, 87%, 53%)oklch(0.87 0.226 129.5)Colors that go with #a3ef1f
Violet, Charcoal and Deep Sky Blue 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.
Violet #ee82ee
complementaryshippedViolet sits directly opposite #a3ef1f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #a3ef1f: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Deep Sky Blue #00bfff
triadicshippedDeep Sky Blue completes a triad with #a3ef1f — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Red #ff0000
shippedRed is paired with #a3ef1f in 3 real palettes, including Wise's brand system and Gatorade's brand system, as the lead colour.
Blue #0000ff
shippedTwo real palettes: Robinhood's brand system and MongoDB's brand system put Blue beside #a3ef1f, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #a3ef1f in two real palettes: Wise's brand system and Ferrari's brand system, as the accent.
Gold #ffd700
shippedGold shows up next to #a3ef1f in two real palettes: Prime Video's brand system and Ikea's brand system, as the lead colour.
Lime Green #32cd32
shippedTwo real palettes: Duolingo's brand system and Monster Energy's brand system put Lime Green beside #a3ef1f, as the lead colour.
Real palettes that use #a3ef1f
Tints & shades
Harmonies
Contrast
| #a3ef1f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.41:1 | fail | fail | fail | |
Aaon black | 14.92:1 | pass | pass | pass | Passes 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 #a3ef1f as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #a3ef1f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/a3ef1f-b0bea2-4e5fdf-222d1f-f1f0e9?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md