Laser
Open in tool →Laser green, violet and cyan — the synthwave/gaming set; keep the type near-white and let one neon own each screen.
Color
#51fa19
#51fa19
hex
#51fa19rgb
rgb(81, 250, 25)hsl
hsl(105, 96%, 54%)oklch
oklch(0.864 0.274 140.3)Closest name: Electric Laser Lime (#26ff2a)Relative luminance 0.7019
Colors that go with #51fa19
Violet, Deep Sky Blue 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.
Violet #ee82ee
complementaryViolet sits directly opposite #51fa19 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Deep Sky Blue #00bfff
triadicshippedDeep Sky Blue completes a triad with #51fa19 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Hot Pink #ff69b4
split-complementHot Pink is a split-complement of #51fa19: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue #0000ff
shippedTwo real palettes: MongoDB's brand system and Robinhood's brand system put Blue beside #51fa19, as the accent.
Charcoal #36454f
neutralCharcoal is the body-text near-black for #51fa19: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Lilac #c8a2c8
split-complementLilac is a split-complement of #51fa19: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Lime Green #32cd32
shippedTwo real palettes: Monster Energy's brand system and Duolingo's brand system put Lime Green beside #51fa19, as the accent.
Red #ff0000
shippedRed is paired with #51fa19 in two real palettes: Gatorade's brand system and Wise's brand system, as the supporting colour.
Real palettes that use #51fa19
Tints & shades
Harmonies
Contrast
| #51fa19 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.4:1 | fail | fail | fail | |
Aaon black | 15.04:1 | 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 #51fa19 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
mcpConnect your agent — build around #51fa19
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #51fa19 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/51fa19-a6bea2-754edf-1f2d22-eff1e9?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