Colour to colour

Mustard Yellow to Cornflower Blue gradient

Mustard Yellow (#ffdb58) into Cornflower Blue (#6495ed) — 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.

Mustard Yellow → Cornflower Blue
black text · worst 7.06:1 · AA
white 1.35 failsblack 7.06 AAbanding 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 1.35 failsblack 7.06 AAbanding medium
css
linear-gradient(135deg in oklab, #ffdb58 0%, #6495ed 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 1.35 failsblack 7.06 AAbanding medium
css
linear-gradient(135deg in oklch shorter hue, #ffdb58 0%, #6495ed 100%)

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

sRGB11%
OKLab11%
OKLCH88%

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 1.35 failsblack 7.05 AAbanding medium
css
linear-gradient(135deg in oklch shorter hue, #ffdb58 0%, #fadc58 8.28%, #ecdd5a 16.03%, #d5df61 23.35%, #b5e170 30.32%, #8ce186 37.03%, #5ade9f 43.56%, #00d7b9 50%, #00cdcf 56.44%, #00c1e0 62.97%, #00b4ea 69.68%, #39a8ef 76.65%, #529eef 83.97%, #6097ee 91.72%, #6495ed 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 1.48 failsblack 7.97 AAbanding high
css
background-color: #b1bdb6;
background-image: radial-gradient(circle farthest-corner at 79.72% 83.26%, rgba(255, 219, 88, 0.792) 0%, rgba(255, 219, 88, 0) 53.67%), radial-gradient(circle farthest-corner at 24.26% 30.78%, rgba(100, 149, 237, 0.785) 0%, rgba(100, 149, 237, 0) 46.74%);
background-image: radial-gradient(circle farthest-corner at 79.72% 83.26%, oklch(from #ffdb58 l c h / 0.7918) 0%, rgb(from #ffdb58 r g b / 0) 53.67%), radial-gradient(circle farthest-corner at 24.26% 30.78%, oklch(from #6495ed l c h / 0.7846) 0%, rgb(from #6495ed r g b / 0) 46.74%);

Report

  • white ink: worst 1.35:1 at 0% (fails AA); black ink: worst 7.06:1 at 100% (AA) → use black text.
  • Banding medium: ~9px bands at 1440px — add grain 19 (≈2% soft-light noise) or shorten the ramp.
  • 3/64 samples left sRGB by more than 5% and were gamut-mapped (oklch shorter); expect slight hue drift there.

Export

css
.gradient {
  background-image: linear-gradient(135deg, #ffdb58 0%, #e6de5b 7.14%, #cbe065 14.29%, #aee174 21.43%, #8fe184 28.57%, #6ddf96 35.71%, #45dca8 42.86%, #00d7b9 50%, #00d1c8 57.14%, #00c9d6 64.29%, #00c0e1 71.43%, #00b7e9 78.57%, #2cacee 85.71%, #4da1ef 92.86%, #6495ed 100%);
  background-image: linear-gradient(135deg in oklch shorter hue, #ffdb58 0%, #6495ed 100%);
}
tailwind v4
bg-linear-to-br/oklch from-[#ffdb58] to-[#6495ed]
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="#ffdb58"/><stop offset="7.14%" stop-color="#e6de5b"/><stop offset="14.29%" stop-color="#cbe065"/><stop offset="21.43%" stop-color="#aee174"/><stop offset="28.57%" stop-color="#8fe184"/><stop offset="35.71%" stop-color="#6ddf96"/><stop offset="42.86%" stop-color="#45dca8"/><stop offset="50%" stop-color="#00d7b9"/><stop offset="57.14%" stop-color="#00d1c8"/><stop offset="64.29%" stop-color="#00c9d6"/><stop offset="71.43%" stop-color="#00c0e1"/><stop offset="78.57%" stop-color="#00b7e9"/><stop offset="85.71%" stop-color="#2cacee"/><stop offset="92.86%" stop-color="#4da1ef"/><stop offset="100%" stop-color="#6495ed"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "mustard-to-cornflowerblue": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            1,
            0.859,
            0.345
          ],
          "hex": "#ffdb58"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.392,
            0.584,
            0.929
          ],
          "hex": "#6495ed"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(135deg in oklch shorter hue, #ffdb58 0%, #6495ed 100%)",
        "interpolation": "oklch",
        "hue": "shorter",
        "angle": 135,
        "name": "mustard-to-cornflowerblue",
        "contrast": {
          "white": {
            "ratio": 1.353,
            "at": 0,
            "passesAA": false,
            "passesAALarge": false
          },
          "black": {
            "ratio": 7.064,
            "at": 1,
            "passesAA": true,
            "passesAALarge": true
          },
          "suggestedInk": "#000000"
        }
      }
    },
    "$description": "Mustard Yellow to Cornflower Blue, interpolated in oklch."
  }
}

More from Mustard Yellow

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 mustard yellow to cornflower 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