Colour to colour

Copper to Cadet Blue gradient

Copper (#b87333) into Cadet Blue (#5f9ea0) — 138° 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.

Copper → Cadet Blue
black text · worst 5.51:1 · AA
white 3.04 AA largeblack 5.51 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 3.04 AA largeblack 5.51 AAbanding high
css
linear-gradient(135deg in oklab, #b87333 0%, #5f9ea0 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 3.05 AA largeblack 5.54 AAbanding high
css
linear-gradient(135deg in oklch shorter hue, #b87333 0%, #5f9ea0 100%)

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

sRGB39%
OKLab32%
OKLCH71%

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 3.04 AA largeblack 5.51 AAbanding high
css
linear-gradient(135deg in oklab, #b87333 0%, #b77435 8.28%, #b4763c 16.03%, #b07944 23.35%, #ab7d4e 30.32%, #a48259 37.03%, #9c8765 43.56%, #948b70 50%, #8b907a 56.44%, #819484 62.97%, #77978d 69.68%, #6e9a95 76.65%, #679c9b 83.97%, #619e9f 91.72%, #5f9ea0 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 3.24 AA largeblack 5.65 AAbanding high
css
background-color: #948b70;
background-image: radial-gradient(circle farthest-corner at 24.99% 18.27%, rgba(184, 115, 51, 0.794) 0%, rgba(184, 115, 51, 0) 49.36%), radial-gradient(circle farthest-corner at 51.32% 65.92%, rgba(95, 158, 160, 0.733) 0%, rgba(95, 158, 160, 0) 50.9%);
background-image: radial-gradient(circle farthest-corner at 24.99% 18.27%, oklch(from #b87333 l c h / 0.7939) 0%, rgb(from #b87333 r g b / 0) 49.36%), radial-gradient(circle farthest-corner at 51.32% 65.92%, oklch(from #5f9ea0 l c h / 0.7326) 0%, rgb(from #5f9ea0 r g b / 0) 50.9%);

Report

  • white ink: worst 3.04:1 at 100% (AA-large only); black ink: worst 5.51:1 at 1% (AA) → use black text.
  • Banding high: ~13px bands at 1440px — add grain 28 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #b87333 0%, #b3773e 7.14%, #af7b48 14.29%, #aa7e50 21.43%, #a58259 28.57%, #9f8561 35.71%, #9a8868 42.86%, #948b70 50%, #8e8e77 57.14%, #87917e 64.29%, #819485 71.43%, #79978c 78.57%, #719993 85.71%, #699c99 92.86%, #5f9ea0 100%);
  background-image: linear-gradient(135deg in oklab, #b87333 0%, #5f9ea0 100%);
}
tailwind v4
bg-linear-to-br/oklab from-[#b87333] to-[#5f9ea0]
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="#b87333"/><stop offset="7.14%" stop-color="#b3773e"/><stop offset="14.29%" stop-color="#af7b48"/><stop offset="21.43%" stop-color="#aa7e50"/><stop offset="28.57%" stop-color="#a58259"/><stop offset="35.71%" stop-color="#9f8561"/><stop offset="42.86%" stop-color="#9a8868"/><stop offset="50%" stop-color="#948b70"/><stop offset="57.14%" stop-color="#8e8e77"/><stop offset="64.29%" stop-color="#87917e"/><stop offset="71.43%" stop-color="#819485"/><stop offset="78.57%" stop-color="#79978c"/><stop offset="85.71%" stop-color="#719993"/><stop offset="92.86%" stop-color="#699c99"/><stop offset="100%" stop-color="#5f9ea0"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "copper-to-cadetblue": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.722,
            0.451,
            0.2
          ],
          "hex": "#b87333"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.373,
            0.62,
            0.627
          ],
          "hex": "#5f9ea0"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklab, #b87333 0%, #5f9ea0 100%)",
        "interpolation": "oklab",
        "angle": 135,
        "name": "copper-to-cadetblue",
        "contrast": {
          "white": {
            "ratio": 3.045,
            "at": 0.9965,
            "passesAA": false,
            "passesAALarge": true
          },
          "black": {
            "ratio": 5.515,
            "at": 0.0089,
            "passesAA": true,
            "passesAALarge": true
          },
          "suggestedInk": "#000000"
        }
      }
    },
    "$description": "Copper to Cadet Blue, interpolated in oklab."
  }
}

More from Copper

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 copper to cadet blue 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