brandsweets

Named gradient · uiGradients

Curiosity blue

Curiosity blue is a blue gradient from uiGradients (MIT) — #525252 → #3d72b4 at 90°. Shown here interpolated in OKLab, next to the original sRGB, with the worst-case contrast for white and black text and every export.

#525252#3d72b4
Open in the makerOriginal sRGB in the maker
Aa — the quick brown fox
white text · worst 4.92:1 · AA
white 4.92 AAblack 2.69 failsbanding high

Same stops, three spaces

The source renders this in sRGB. The number is how much chroma survives at the dullest point along the line — the difference between the first bar and the others is the grey that OKLab removes.

sRGB0%
OKLab0%
OKLCH0%

Report

  • white ink: worst 4.92:1 at 100% (AA); black ink: worst 2.69:1 at 0% (fails AA) → use white text.
  • Banding high: ~15px bands at 1440px — add grain 30 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(90deg, #525252 0%, #515559 7.14%, #505760 14.29%, #4f5a67 21.43%, #4e5c6e 28.57%, #4d5e75 35.71%, #4c617c 42.86%, #4a6383 50%, #49658a 57.14%, #476791 64.29%, #456a98 71.43%, #446c9f 78.57%, #426ea6 85.71%, #3f70ad 92.86%, #3d72b4 100%);
  background-image: linear-gradient(90deg in oklab, #525252 0%, #3d72b4 100%);
}
tailwind v4
bg-linear-to-r/oklab from-[#525252] to-[#3d72b4]
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="0" y1="300" x2="1440" y2="300"><stop offset="0%" stop-color="#525252"/><stop offset="7.14%" stop-color="#515559"/><stop offset="14.29%" stop-color="#505760"/><stop offset="21.43%" stop-color="#4f5a67"/><stop offset="28.57%" stop-color="#4e5c6e"/><stop offset="35.71%" stop-color="#4d5e75"/><stop offset="42.86%" stop-color="#4c617c"/><stop offset="50%" stop-color="#4a6383"/><stop offset="57.14%" stop-color="#49658a"/><stop offset="64.29%" stop-color="#476791"/><stop offset="71.43%" stop-color="#456a98"/><stop offset="78.57%" stop-color="#446c9f"/><stop offset="85.71%" stop-color="#426ea6"/><stop offset="92.86%" stop-color="#3f70ad"/><stop offset="100%" stop-color="#3d72b4"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "curiosity-blue": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.322,
            0.322,
            0.322
          ],
          "hex": "#525252"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.239,
            0.447,
            0.706
          ],
          "hex": "#3d72b4"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(90deg in oklab, #525252 0%, #3d72b4 100%)",
        "interpolation": "oklab",
        "angle": 90,
        "name": "Curiosity blue",
        "contrast": {
          "white": {
            "ratio": 4.924,
            "at": 1,
            "passesAA": true,
            "passesAALarge": true
          },
          "black": {
            "ratio": 2.688,
            "at": 0,
            "passesAA": false,
            "passesAALarge": false
          },
          "suggestedInk": "#ffffff"
        }
      }
    },
    "$description": "Curiosity blue (uiGradients, MIT), rendered in OKLab."
  }
}

Tagged

Blue gradientsCool

More blue gradients

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

›take the Curiosity blue gradient (#525252, #3d72b4), re-interpolate it in oklch, and tell me the worst-case contrast for white text

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: gradients.md · From uiGradients (MIT) — licences