Colour to colour

Denim to Sienna gradient

Denim (#1560bd) into Sienna (#a0522d) — 148° 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 148° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

Denim → Sienna
white text · worst 5.61:1 · AA
white 5.61 AAblack 3.37 AA largebanding 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 5.59 AAblack 3.44 AA largebanding high
css
linear-gradient(135deg in oklab, #1560bd 0%, #a0522d 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 5.61 AAblack 3.37 AA largebanding high
css
linear-gradient(135deg in oklch shorter hue, #1560bd 0%, #a0522d 100%)

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

sRGB22%
OKLab27%
OKLCH83%

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 5.61 AAblack 3.37 AA largebanding high
css
linear-gradient(135deg in oklch shorter hue, #1560bd 0%, #215fbd 8.28%, #365cbd 16.03%, #4c57bc 23.35%, #6052b6 30.32%, #744dac 37.03%, #84489e 43.56%, #92448b 50%, #9c4377 56.44%, #a24463 62.97%, #a44651 69.68%, #a44a42 76.65%, #a24e37 83.97%, #a15130 91.72%, #a0522d 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 5.76 AAblack 3.34 AA largebanding high
css
background-color: #6b617d;
background-image: radial-gradient(circle farthest-corner at 66.57% 97.57%, rgba(21, 96, 189, 0.747) 0%, rgba(21, 96, 189, 0) 45.24%), radial-gradient(circle farthest-corner at 78.29% 30.5%, rgba(160, 82, 45, 0.725) 0%, rgba(160, 82, 45, 0) 55.18%);
background-image: radial-gradient(circle farthest-corner at 66.57% 97.57%, oklch(from #1560bd l c h / 0.7473) 0%, rgb(from #1560bd r g b / 0) 45.24%), radial-gradient(circle farthest-corner at 78.29% 30.5%, oklch(from #a0522d l c h / 0.7254) 0%, rgb(from #a0522d r g b / 0) 55.18%);

Report

  • white ink: worst 5.61:1 at 100% (AA); black ink: worst 3.37:1 at 26% (AA-large only) → use white text.
  • 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, #1560bd 0%, #3c5bbd 7.14%, #5356ba 14.29%, #6451b5 21.43%, #734dad 28.57%, #7f49a3 35.71%, #894798 42.86%, #92448b 50%, #99437e 57.14%, #9e4370 64.29%, #a24462 71.43%, #a44654 78.57%, #a44947 85.71%, #a34d3a 92.86%, #a0522d 100%);
  background-image: linear-gradient(135deg in oklch shorter hue, #1560bd 0%, #a0522d 100%);
}
tailwind v4
bg-linear-to-br/oklch from-[#1560bd] to-[#a0522d]
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="#1560bd"/><stop offset="7.14%" stop-color="#3c5bbd"/><stop offset="14.29%" stop-color="#5356ba"/><stop offset="21.43%" stop-color="#6451b5"/><stop offset="28.57%" stop-color="#734dad"/><stop offset="35.71%" stop-color="#7f49a3"/><stop offset="42.86%" stop-color="#894798"/><stop offset="50%" stop-color="#92448b"/><stop offset="57.14%" stop-color="#99437e"/><stop offset="64.29%" stop-color="#9e4370"/><stop offset="71.43%" stop-color="#a24462"/><stop offset="78.57%" stop-color="#a44654"/><stop offset="85.71%" stop-color="#a44947"/><stop offset="92.86%" stop-color="#a34d3a"/><stop offset="100%" stop-color="#a0522d"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "denim-to-sienna": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.082,
            0.376,
            0.741
          ],
          "hex": "#1560bd"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.627,
            0.322,
            0.176
          ],
          "hex": "#a0522d"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklch shorter hue, #1560bd 0%, #a0522d 100%)",
        "interpolation": "oklch",
        "hue": "shorter",
        "angle": 135,
        "name": "denim-to-sienna",
        "contrast": {
          "white": {
            "ratio": 5.613,
            "at": 0.9971,
            "passesAA": true,
            "passesAALarge": true
          },
          "black": {
            "ratio": 3.367,
            "at": 0.2593,
            "passesAA": false,
            "passesAALarge": true
          },
          "suggestedInk": "#ffffff"
        }
      }
    },
    "$description": "Denim to Sienna, interpolated in oklch."
  }
}

More from Denim

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 denim to sienna 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