Colour to colour

Emerald Green to Violet gradient

Emerald Green (#50c878) into Violet (#ee82ee) — 176° apart on the OKLCH hue wheel. Below: the same two stops interpolated in OKLab and in OKLCH, side by side, because the difference is real and most generators never let you see it; then an eased version and a mesh, each with the worst-case contrast for white and black text. The engine's own pick for this pair is oklch: ΔH 176° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

Emerald Green → Violet
black text · worst 8.94:1 · AA
white 2.03 failsblack 8.94 AAbanding high

OKLab and OKLCH, side by side

Aa

A straight line through the a/b plane: the two hues meet halfway and desaturate a little at the midpoint. The safe default — it is what CSS and Tailwind default to.

white 2.12 failsblack 9.06 AAbanding high
css
linear-gradient(135deg in oklab, #50c878 0%, #ee82ee 100%)
Aa

OKLCH (shorter hue)

Open in maker →

Chroma and hue interpolate separately, so the midpoint keeps its saturation and the hue travels the short way round the wheel — richer, and it can pass through hues neither colour has.

white 2.03 failsblack 8.94 AAbanding high
css
linear-gradient(135deg in oklch shorter hue, #50c878 0%, #ee82ee 100%)

And the sRGB line most tools draw, for comparison — the number is the chroma that survives at the dullest point.

sRGB11%
OKLab4%
OKLCH75%

Eased and mesh

Aa

Eased (soft)

Open in maker →

A cubic-bezier(.4, 0, .6, 1) mix ratio baked into 15 stops: the transition lingers on each colour and moves faster through the middle, which is what makes a gradient read as designed rather than default.

white 2.03 failsblack 8.94 AAbanding high
css
linear-gradient(135deg in oklch shorter hue, #50c878 0%, #46c97d 8.28%, #20cb8c 16.03%, #00cda2 23.35%, #00cbbc 30.32%, #00c8d7 37.03%, #00c3f4 43.56%, #17bbff 50%, #72b0ff 56.44%, #97a6ff 62.97%, #b49bff 69.68%, #cf8eff 76.65%, #e087fd 83.97%, #eb83f2 91.72%, #ee82ee 100%)
Aa

Both colours as stacked radials over a base, laid out by a seeded Poisson-disc sampler — the same seed gives the same mesh forever. Exports as CSS, SVG and PNG.

white 2.20 failsblack 8.97 AAbanding high
css
background-color: #b1adb7;
background-image: radial-gradient(circle farthest-corner at 0.35% 14.26%, rgba(238, 130, 238, 0.856) 0%, rgba(238, 130, 238, 0) 49.2%), radial-gradient(circle farthest-corner at 84.16% 22.44%, rgba(80, 200, 120, 0.859) 0%, rgba(80, 200, 120, 0) 52.76%);
background-image: radial-gradient(circle farthest-corner at 0.35% 14.26%, oklch(from #ee82ee l c h / 0.8558) 0%, rgb(from #ee82ee r g b / 0) 49.2%), radial-gradient(circle farthest-corner at 84.16% 22.44%, oklch(from #50c878 l c h / 0.8594) 0%, rgb(from #50c878 r g b / 0) 52.76%);

Report

  • white ink: worst 2.03:1 at 15% (fails AA); black ink: worst 8.94:1 at 87% (AA) → use black text.
  • Banding high: ~9px bands at 1440px — add grain 18 (≈2% soft-light noise) or shorten the ramp.
  • 50/64 samples left sRGB by more than 5% and were gamut-mapped (oklch shorter); expect slight hue drift there.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #50c878 0%, #00cb91 7.14%, #00cdab 14.29%, #00cbc1 21.43%, #00c8d5 28.57%, #00c5e9 35.71%, #00c1ff 42.86%, #17bbff 50%, #60b4ff 57.14%, #81adff 64.29%, #99a6ff 71.43%, #af9dff 78.57%, #c792ff 85.71%, #dc89ff 92.86%, #ee82ee 100%);
  background-image: linear-gradient(135deg in oklch shorter hue, #50c878 0%, #ee82ee 100%);
}
tailwind v4
bg-linear-to-br/oklch from-[#50c878] to-[#ee82ee]
svg
<svg xmlns="http://www.w3.org/2000/svg" width="1440" height="600" viewBox="0 0 1440 600"><defs><linearGradient id="bs-gradient" gradientUnits="userSpaceOnUse" x1="210" y1="-210" x2="1230" y2="810"><stop offset="0%" stop-color="#50c878"/><stop offset="7.14%" stop-color="#00cb91"/><stop offset="14.29%" stop-color="#00cdab"/><stop offset="21.43%" stop-color="#00cbc1"/><stop offset="28.57%" stop-color="#00c8d5"/><stop offset="35.71%" stop-color="#00c5e9"/><stop offset="42.86%" stop-color="#00c1ff"/><stop offset="50%" stop-color="#17bbff"/><stop offset="57.14%" stop-color="#60b4ff"/><stop offset="64.29%" stop-color="#81adff"/><stop offset="71.43%" stop-color="#99a6ff"/><stop offset="78.57%" stop-color="#af9dff"/><stop offset="85.71%" stop-color="#c792ff"/><stop offset="92.86%" stop-color="#dc89ff"/><stop offset="100%" stop-color="#ee82ee"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "emerald-green-to-violet": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.314,
            0.784,
            0.471
          ],
          "hex": "#50c878"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.933,
            0.51,
            0.933
          ],
          "hex": "#ee82ee"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklch shorter hue, #50c878 0%, #ee82ee 100%)",
        "interpolation": "oklch",
        "hue": "shorter",
        "angle": 135,
        "name": "emerald-green-to-violet",
        "contrast": {
          "white": {
            "ratio": 2.03,
            "at": 0.1516,
            "passesAA": false,
            "passesAALarge": false
          },
          "black": {
            "ratio": 8.94,
            "at": 0.873,
            "passesAA": true,
            "passesAALarge": true
          },
          "suggestedInk": "#000000"
        }
      }
    },
    "$description": "Emerald Green to Violet, interpolated in oklch."
  }
}

More from Emerald Green

mcpConnect your agent to the gradient engine
live endpoint

Point any MCP client at the shared gradients endpoint and your agent gets the same engine as this page — make_gradient returns CSS with the interpolation space, Tailwind v4, SVG, a PNG URL, a DTCG token and the contrast report in one call; brand_gradients derives the whole contact sheet from a brand or a palette. Read-only, no key. Every gradient is a /gradients/new/… link: open it, refine, paste it back.

endpointhttps://mcp.brandsweets.com/gradients/mcp
claude mcp add --transport http brandsweets-gradients https://mcp.brandsweets.com/gradients/mcp
try this prompt

make a emerald green to violet hero gradient in oklch that passes AA for white text, with grain if it bands

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: gradients.md