Colour to colour · generated

Olive Green to Indigo gradient

Olive Green (#808000) into Indigo (#4b0082) — 168° 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 168° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

Olive Green → Indigo
white text · worst 4.20:1 · AA large
white 4.20 AA largeblack 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 4.19 AA largeblack 1.62 failsbanding medium
css
linear-gradient(135deg in oklab, #808000 0%, #4b0082 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 4.20 AA largeblack 1.62 failsbanding medium
css
linear-gradient(135deg in oklch shorter hue, #808000 0%, #4b0082 100%)

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

sRGB33%
OKLab10%
OKLCH74%

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 4.18 AA largeblack 1.62 failsbanding medium
css
linear-gradient(135deg in oklch shorter hue, #808000 0%, #827e00 8.28%, #887700 16.03%, #906d00 23.35%, #965f00 30.32%, #9d4e00 37.03%, #9f3a00 43.56%, #9b2727 50%, #921640 56.44%, #850955 62.97%, #750467 69.68%, #650274 76.65%, #58017c 83.97%, #4e0081 91.72%, #4b0082 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 7.27 AAblack 2.04 failsbanding high
css
background-color: #615261;
background-image: radial-gradient(circle farthest-corner at 55.76% 80.95%, rgba(75, 0, 130, 0.797) 0%, rgba(75, 0, 130, 0) 49.83%), radial-gradient(circle farthest-corner at 87.61% 48.29%, rgba(128, 128, 0, 0.743) 0%, rgba(128, 128, 0, 0) 50.93%);
background-image: radial-gradient(circle farthest-corner at 55.76% 80.95%, oklch(from #4b0082 l c h / 0.7967) 0%, rgb(from #4b0082 r g b / 0) 49.83%), radial-gradient(circle farthest-corner at 87.61% 48.29%, oklch(from #808000 l c h / 0.7434) 0%, rgb(from #808000 r g b / 0) 50.93%);

Report

  • white ink: worst 4.20:1 at 0% (AA-large only); black ink: worst 1.62:1 at 100% (fails AA) → use white text.
  • Body text fails AA everywhere on this gradient; large text (≥24px / 19px bold) is fine. Add a scrim or lower the chroma for body copy.
  • Banding medium: ~11px bands at 1440px — add grain 23 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #808000 0%, #8a7500 7.14%, #926900 14.29%, #985d00 21.43%, #9d4f00 28.57%, #9f4100 35.71%, #9f340c 42.86%, #9b2727 50%, #961b38 57.14%, #8e1148 64.29%, #840956 71.43%, #780464 78.57%, #6a0370 85.71%, #5b017a 92.86%, #4b0082 100%);
  background-image: linear-gradient(135deg in oklch shorter hue, #808000 0%, #4b0082 100%);
}
tailwind v4
bg-linear-to-br/oklch from-[#808000] to-[#4b0082]
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="#808000"/><stop offset="7.14%" stop-color="#8a7500"/><stop offset="14.29%" stop-color="#926900"/><stop offset="21.43%" stop-color="#985d00"/><stop offset="28.57%" stop-color="#9d4f00"/><stop offset="35.71%" stop-color="#9f4100"/><stop offset="42.86%" stop-color="#9f340c"/><stop offset="50%" stop-color="#9b2727"/><stop offset="57.14%" stop-color="#961b38"/><stop offset="64.29%" stop-color="#8e1148"/><stop offset="71.43%" stop-color="#840956"/><stop offset="78.57%" stop-color="#780464"/><stop offset="85.71%" stop-color="#6a0370"/><stop offset="92.86%" stop-color="#5b017a"/><stop offset="100%" stop-color="#4b0082"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "olive-to-indigo": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.502,
            0.502,
            0
          ],
          "hex": "#808000"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.294,
            0,
            0.51
          ],
          "hex": "#4b0082"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklch shorter hue, #808000 0%, #4b0082 100%)",
        "interpolation": "oklch",
        "hue": "shorter",
        "angle": 135,
        "name": "olive-to-indigo",
        "contrast": {
          "white": {
            "ratio": 4.195,
            "at": 0,
            "passesAA": false,
            "passesAALarge": true
          },
          "black": {
            "ratio": 1.622,
            "at": 1,
            "passesAA": false,
            "passesAALarge": false
          },
          "suggestedInk": "#ffffff"
        }
      }
    },
    "$description": "Olive Green to Indigo, interpolated in oklch."
  }
}

More from Olive Green

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 olive green to indigo 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