Colour to colour

Indigo to Teal gradient

Indigo (#4b0082) into Teal (#008080) — 107° 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.

Indigo → Teal
white text · worst 4.77:1 · AA
white 4.77 AAblack 1.62 failsbanding medium

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 4.77 AAblack 1.62 failsbanding medium
css
linear-gradient(135deg in oklab, #4b0082 0%, #008080 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 4.77 AAblack 1.62 failsbanding medium
css
linear-gradient(135deg in oklch shorter hue, #4b0082 0%, #008080 100%)

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

sRGB62%
OKLab52%
OKLCH67%

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 4.77 AAblack 1.62 failsbanding medium
css
linear-gradient(135deg in oklab, #4b0082 0%, #4b0582 8.28%, #4b1282 16.03%, #4a1f83 23.35%, #492c83 30.32%, #483883 37.03%, #454383 43.56%, #414f83 50%, #3c5a83 56.44%, #366483 62.97%, #2d6d82 69.68%, #237581 76.65%, #167b81 83.97%, #077f80 91.72%, #008080 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 6.91 AAblack 2.03 failsbanding low
css
background-color: #414f83;
background-image: radial-gradient(circle farthest-corner at 21.99% 58.25%, rgba(75, 0, 130, 0.827) 0%, rgba(75, 0, 130, 0) 47.88%), radial-gradient(circle farthest-corner at 86.03% 47.35%, rgba(0, 128, 128, 0.726) 0%, rgba(0, 128, 128, 0) 48.06%);
background-image: radial-gradient(circle farthest-corner at 21.99% 58.25%, oklch(from #4b0082 l c h / 0.8268) 0%, rgb(from #4b0082 r g b / 0) 47.88%), radial-gradient(circle farthest-corner at 86.03% 47.35%, oklch(from #008080 l c h / 0.7255) 0%, rgb(from #008080 r g b / 0) 48.06%);

Report

  • white ink: worst 4.77:1 at 100% (AA); black ink: worst 1.62:1 at 0% (fails AA) → use white text.
  • Banding medium: ~11px bands at 1440px — add grain 24 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #4b0082 0%, #4b1682 7.14%, #4a2383 14.29%, #492e83 21.43%, #483783 28.57%, #463f83 35.71%, #444783 42.86%, #414f83 50%, #3e5683 57.14%, #3a5d83 64.29%, #356583 71.43%, #2f6b82 78.57%, #267282 85.71%, #1a7981 92.86%, #008080 100%);
  background-image: linear-gradient(135deg in oklab, #4b0082 0%, #008080 100%);
}
tailwind v4
bg-linear-to-br/oklab from-[#4b0082] to-[#008080]
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="#4b0082"/><stop offset="7.14%" stop-color="#4b1682"/><stop offset="14.29%" stop-color="#4a2383"/><stop offset="21.43%" stop-color="#492e83"/><stop offset="28.57%" stop-color="#483783"/><stop offset="35.71%" stop-color="#463f83"/><stop offset="42.86%" stop-color="#444783"/><stop offset="50%" stop-color="#414f83"/><stop offset="57.14%" stop-color="#3e5683"/><stop offset="64.29%" stop-color="#3a5d83"/><stop offset="71.43%" stop-color="#356583"/><stop offset="78.57%" stop-color="#2f6b82"/><stop offset="85.71%" stop-color="#267282"/><stop offset="92.86%" stop-color="#1a7981"/><stop offset="100%" stop-color="#008080"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "indigo-to-teal": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.294,
            0,
            0.51
          ],
          "hex": "#4b0082"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0,
            0.502,
            0.502
          ],
          "hex": "#008080"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklab, #4b0082 0%, #008080 100%)",
        "interpolation": "oklab",
        "angle": 135,
        "name": "indigo-to-teal",
        "contrast": {
          "white": {
            "ratio": 4.773,
            "at": 1,
            "passesAA": true,
            "passesAALarge": true
          },
          "black": {
            "ratio": 1.622,
            "at": 0,
            "passesAA": false,
            "passesAALarge": false
          },
          "suggestedInk": "#ffffff"
        }
      }
    },
    "$description": "Indigo to Teal, interpolated in oklab."
  }
}

More from Indigo

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 indigo to teal 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