Colour to colour

Rust to Hunter Green gradient

Rust (#b7410e) into Hunter Green (#355e3b) — 108° 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.

Rust → Hunter Green
white text · worst 5.56:1 · AA
white 5.56 AAblack 2.82 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 5.56 AAblack 2.82 failsbanding high
css
linear-gradient(135deg in oklab, #b7410e 0%, #355e3b 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 5.56 AAblack 2.82 failsbanding high
css
linear-gradient(135deg in oklch shorter hue, #b7410e 0%, #355e3b 100%)

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

sRGB49%
OKLab49%
OKLCH62%

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 5.56 AAblack 2.82 failsbanding high
css
linear-gradient(135deg in oklab, #b7410e 0%, #b54210 8.28%, #b14514 16.03%, #aa4819 23.35%, #a14c1e 30.32%, #965023 37.03%, #8b5328 43.56%, #7e562c 50%, #715930 56.44%, #635b33 62.97%, #565c36 69.68%, #4a5d38 76.65%, #405e3a 83.97%, #385e3b 91.72%, #355e3b 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 6.37 AAblack 2.96 failsbanding high
css
background-color: #7e562c;
background-image: radial-gradient(circle farthest-corner at 18.2% 74.48%, rgba(183, 65, 14, 0.84) 0%, rgba(183, 65, 14, 0) 50.28%), radial-gradient(circle farthest-corner at 40.75% 2.88%, rgba(53, 94, 59, 0.78) 0%, rgba(53, 94, 59, 0) 52.18%);
background-image: radial-gradient(circle farthest-corner at 18.2% 74.48%, oklch(from #b7410e l c h / 0.8402) 0%, rgb(from #b7410e r g b / 0) 50.28%), radial-gradient(circle farthest-corner at 40.75% 2.88%, oklch(from #355e3b l c h / 0.7796) 0%, rgb(from #355e3b r g b / 0) 52.18%);

Report

  • white ink: worst 5.56:1 at 0% (AA); black ink: worst 2.82:1 at 100% (fails AA) → use white text.
  • Banding high: ~11px bands at 1440px — add grain 23 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #b7410e 0%, #af4515 7.14%, #a7491b 14.29%, #9f4d1f 21.43%, #975023 28.57%, #8f5226 35.71%, #865429 42.86%, #7e562c 50%, #75582f 57.14%, #6c5a31 64.29%, #635b33 71.43%, #595c35 78.57%, #4e5d37 85.71%, #425d39 92.86%, #355e3b 100%);
  background-image: linear-gradient(135deg in oklab, #b7410e 0%, #355e3b 100%);
}
tailwind v4
bg-linear-to-br/oklab from-[#b7410e] to-[#355e3b]
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="#b7410e"/><stop offset="7.14%" stop-color="#af4515"/><stop offset="14.29%" stop-color="#a7491b"/><stop offset="21.43%" stop-color="#9f4d1f"/><stop offset="28.57%" stop-color="#975023"/><stop offset="35.71%" stop-color="#8f5226"/><stop offset="42.86%" stop-color="#865429"/><stop offset="50%" stop-color="#7e562c"/><stop offset="57.14%" stop-color="#75582f"/><stop offset="64.29%" stop-color="#6c5a31"/><stop offset="71.43%" stop-color="#635b33"/><stop offset="78.57%" stop-color="#595c35"/><stop offset="85.71%" stop-color="#4e5d37"/><stop offset="92.86%" stop-color="#425d39"/><stop offset="100%" stop-color="#355e3b"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "rust-to-hunter-green": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.718,
            0.255,
            0.055
          ],
          "hex": "#b7410e"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.208,
            0.369,
            0.231
          ],
          "hex": "#355e3b"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklab, #b7410e 0%, #355e3b 100%)",
        "interpolation": "oklab",
        "angle": 135,
        "name": "rust-to-hunter-green",
        "contrast": {
          "white": {
            "ratio": 5.562,
            "at": 0,
            "passesAA": true,
            "passesAALarge": true
          },
          "black": {
            "ratio": 2.816,
            "at": 1,
            "passesAA": false,
            "passesAALarge": false
          },
          "suggestedInk": "#ffffff"
        }
      }
    },
    "$description": "Rust to Hunter Green, interpolated in oklab."
  }
}

More from Rust

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 rust to hunter 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