Colour to colour

Burgundy to Sea Green gradient

Burgundy (#800020) into Sea Green (#2e8b57) — 136° 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 oklab — both colours are in the palette and the hue gap is small enough that the straight line stays clean.

Burgundy → Sea Green
white text · worst 4.25:1 · AA large
white 4.25 AA largeblack 1.94 failsbanding 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 4.25 AA largeblack 1.94 failsbanding high
css
linear-gradient(135deg in oklab, #800020 0%, #2e8b57 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 4.24 AA largeblack 1.94 failsbanding high
css
linear-gradient(135deg in oklch shorter hue, #800020 0%, #2e8b57 100%)

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

sRGB18%
OKLab37%
OKLCH72%

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 4.24 AA largeblack 1.94 failsbanding high
css
linear-gradient(135deg in oklab, #800020 0%, #800621 8.28%, #7f1523 16.03%, #7e2326 23.35%, #7c312a 30.32%, #793e2f 37.03%, #754b35 43.56%, #6f573b 50%, #686241 56.44%, #5f6d46 62.97%, #55774c 69.68%, #497f50 76.65%, #3d8554 83.97%, #328a56 91.72%, #2e8b57 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 5.95 AAblack 2.67 failsbanding high
css
background-color: #6f573b;
background-image: radial-gradient(circle farthest-corner at 87.14% 13.96%, rgba(128, 0, 32, 0.745) 0%, rgba(128, 0, 32, 0) 56.36%), radial-gradient(circle farthest-corner at 1.2% 39.85%, rgba(46, 139, 87, 0.708) 0%, rgba(46, 139, 87, 0) 46.86%);
background-image: radial-gradient(circle farthest-corner at 87.14% 13.96%, oklch(from #800020 l c h / 0.7448) 0%, rgb(from #800020 r g b / 0) 56.36%), radial-gradient(circle farthest-corner at 1.2% 39.85%, oklch(from #2e8b57 l c h / 0.708) 0%, rgb(from #2e8b57 r g b / 0) 46.86%);

Report

  • white ink: worst 4.25:1 at 100% (AA-large only); black ink: worst 1.94:1 at 0% (fails AA) → use white text.
  • Body text fails AA everywhere on this gradient; large text (≥24px / 19px bold) is fine. Add a scrim or lower the chroma for body copy.
  • Banding high: ~10px bands at 1440px — add grain 21 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #800020 0%, #7f1924 7.14%, #7d2828 14.29%, #7c332b 21.43%, #793d2f 28.57%, #774633 35.71%, #734f37 42.86%, #6f573b 50%, #6b5f3f 57.14%, #656643 64.29%, #5f6e47 71.43%, #57754b 78.57%, #4d7d4f 85.71%, #408453 92.86%, #2e8b57 100%);
  background-image: linear-gradient(135deg in oklab, #800020 0%, #2e8b57 100%);
}
tailwind v4
bg-linear-to-br/oklab from-[#800020] to-[#2e8b57]
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="#800020"/><stop offset="7.14%" stop-color="#7f1924"/><stop offset="14.29%" stop-color="#7d2828"/><stop offset="21.43%" stop-color="#7c332b"/><stop offset="28.57%" stop-color="#793d2f"/><stop offset="35.71%" stop-color="#774633"/><stop offset="42.86%" stop-color="#734f37"/><stop offset="50%" stop-color="#6f573b"/><stop offset="57.14%" stop-color="#6b5f3f"/><stop offset="64.29%" stop-color="#656643"/><stop offset="71.43%" stop-color="#5f6e47"/><stop offset="78.57%" stop-color="#57754b"/><stop offset="85.71%" stop-color="#4d7d4f"/><stop offset="92.86%" stop-color="#408453"/><stop offset="100%" stop-color="#2e8b57"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "burgundy-to-seagreen": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.502,
            0,
            0.125
          ],
          "hex": "#800020"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.18,
            0.545,
            0.341
          ],
          "hex": "#2e8b57"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklab, #800020 0%, #2e8b57 100%)",
        "interpolation": "oklab",
        "angle": 135,
        "name": "burgundy-to-seagreen",
        "contrast": {
          "white": {
            "ratio": 4.245,
            "at": 1,
            "passesAA": false,
            "passesAALarge": true
          },
          "black": {
            "ratio": 1.939,
            "at": 0,
            "passesAA": false,
            "passesAALarge": false
          },
          "suggestedInk": "#ffffff"
        }
      }
    },
    "$description": "Burgundy to Sea Green, interpolated in oklab."
  }
}

More from Burgundy

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 burgundy to sea green 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