Colour to colour

Terracotta to Amber gradient

Terracotta (#e2725b) into Amber (#ffbf00) — 51° 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.

Terracotta → Amber
black text · worst 6.79:1 · AA
white 1.65 failsblack 6.79 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 1.65 failsblack 6.79 AAbanding high
css
linear-gradient(135deg in oklab, #e2725b 0%, #ffbf00 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 1.65 failsblack 6.79 AAbanding high
css
linear-gradient(135deg in oklch shorter hue, #e2725b 0%, #ffbf00 100%)

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

sRGB90%
OKLab88%
OKLCH91%

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 1.65 failsblack 6.79 AAbanding high
css
linear-gradient(135deg in oklab, #e2725b 0%, #e2735b 8.28%, #e47659 16.03%, #e67c57 23.35%, #e88254 30.32%, #eb8951 37.03%, #ee914c 43.56%, #f19946 50%, #f4a13f 56.44%, #f7a937 62.97%, #fab02d 69.68%, #fcb622 76.65%, #febb15 83.97%, #ffbe07 91.72%, #ffbf00 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 2.24 failsblack 8.40 AAbanding low
css
background-color: #f19946;
background-image: radial-gradient(circle farthest-corner at 14.04% 85.71%, rgba(255, 191, 0, 0.871) 0%, rgba(255, 191, 0, 0) 50.48%), radial-gradient(circle farthest-corner at 56.24% 44.83%, rgba(226, 114, 91, 0.705) 0%, rgba(226, 114, 91, 0) 48.43%);
background-image: radial-gradient(circle farthest-corner at 14.04% 85.71%, oklch(from #ffbf00 l c h / 0.8714) 0%, rgb(from #ffbf00 r g b / 0) 50.48%), radial-gradient(circle farthest-corner at 56.24% 44.83%, oklch(from #e2725b l c h / 0.7051) 0%, rgb(from #e2725b r g b / 0) 48.43%);

Report

  • white ink: worst 1.65:1 at 99% (fails AA); black ink: worst 6.79:1 at 0% (AA) → use black text.
  • Banding high: ~16px bands at 1440px — add grain 32 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #e2725b 0%, #e47859 7.14%, #e77d56 14.29%, #e98354 21.43%, #eb8951 28.57%, #ed8e4e 35.71%, #ef944a 42.86%, #f19946 50%, #f39f42 57.14%, #f5a43c 64.29%, #f7aa36 71.43%, #f9af2f 78.57%, #fbb426 85.71%, #fdba19 92.86%, #ffbf00 100%);
  background-image: linear-gradient(135deg in oklab, #e2725b 0%, #ffbf00 100%);
}
tailwind v4
bg-linear-to-br/oklab from-[#e2725b] to-[#ffbf00]
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="#e2725b"/><stop offset="7.14%" stop-color="#e47859"/><stop offset="14.29%" stop-color="#e77d56"/><stop offset="21.43%" stop-color="#e98354"/><stop offset="28.57%" stop-color="#eb8951"/><stop offset="35.71%" stop-color="#ed8e4e"/><stop offset="42.86%" stop-color="#ef944a"/><stop offset="50%" stop-color="#f19946"/><stop offset="57.14%" stop-color="#f39f42"/><stop offset="64.29%" stop-color="#f5a43c"/><stop offset="71.43%" stop-color="#f7aa36"/><stop offset="78.57%" stop-color="#f9af2f"/><stop offset="85.71%" stop-color="#fbb426"/><stop offset="92.86%" stop-color="#fdba19"/><stop offset="100%" stop-color="#ffbf00"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "terracotta-to-amber": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.886,
            0.447,
            0.357
          ],
          "hex": "#e2725b"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            1,
            0.749,
            0
          ],
          "hex": "#ffbf00"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklab, #e2725b 0%, #ffbf00 100%)",
        "interpolation": "oklab",
        "angle": 135,
        "name": "terracotta-to-amber",
        "contrast": {
          "white": {
            "ratio": 1.653,
            "at": 0.9947,
            "passesAA": false,
            "passesAALarge": false
          },
          "black": {
            "ratio": 6.792,
            "at": 0,
            "passesAA": true,
            "passesAALarge": true
          },
          "suggestedInk": "#000000"
        }
      }
    },
    "$description": "Terracotta to Amber, interpolated in oklab."
  }
}

More from Terracotta

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 terracotta to amber 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