brandsweets

Named gradient · uiGradients

Royal Blue + Petrol

Royal Blue + Petrol is a blue gradient from uiGradients (MIT) — #bbd2c5 → #536976 → #292e49 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.

#bbd2c5#536976#292e49
Open in the makerOriginal sRGB in the maker
Aa — the quick brown fox
white text · worst 1.60:1 · fails
white 1.60 failsblack 1.58 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.

sRGB62%
OKLab62%
OKLCH77%

Report

  • white ink: worst 1.60:1 at 0% (fails AA); black ink: worst 1.58:1 at 100% (fails AA) → use white text.
  • Neither ink passes AA at the worst point — treat as decorative or add a scrim (rgba(0,0,0,.35) typically lifts white ink past 4:1).
  • Banding high: ~12px bands at 1440px — add grain 25 (≈2% soft-light noise) or shorten the ramp.

Export

css
.gradient {
  background-image: linear-gradient(90deg, #bbd2c5 0%, #b3cabf 3.57%, #abc2b9 7.14%, #a4bbb4 10.71%, #9cb3ae 14.29%, #94aba8 17.86%, #8da4a3 21.43%, #859c9d 25%, #7e9597 28.57%, #768d92 32.14%, #6f868c 35.71%, #687e87 39.29%, #617781 42.86%, #5a707b 46.43%, #536976 50%, #506573 53.57%, #4d606f 57.14%, #4a5c6c 60.71%, #465869 64.29%, #435366 67.86%, #404f63 71.43%, #3d4b5f 75%, #3a475c 78.57%, #374259 82.14%, #343e56 85.71%, #323a52 89.29%, #2f364f 92.86%, #2c324c 96.43%, #292e49 100%);
  background-image: linear-gradient(90deg in oklab, #bbd2c5 0%, #536976 50%, #292e49 100%);
}
tailwind v4
bg-linear-to-r/oklab from-[#bbd2c5] via-[#536976] to-[#292e49]
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="#bbd2c5"/><stop offset="3.57%" stop-color="#b3cabf"/><stop offset="7.14%" stop-color="#abc2b9"/><stop offset="10.71%" stop-color="#a4bbb4"/><stop offset="14.29%" stop-color="#9cb3ae"/><stop offset="17.86%" stop-color="#94aba8"/><stop offset="21.43%" stop-color="#8da4a3"/><stop offset="25%" stop-color="#859c9d"/><stop offset="28.57%" stop-color="#7e9597"/><stop offset="32.14%" stop-color="#768d92"/><stop offset="35.71%" stop-color="#6f868c"/><stop offset="39.29%" stop-color="#687e87"/><stop offset="42.86%" stop-color="#617781"/><stop offset="46.43%" stop-color="#5a707b"/><stop offset="50%" stop-color="#536976"/><stop offset="53.57%" stop-color="#506573"/><stop offset="57.14%" stop-color="#4d606f"/><stop offset="60.71%" stop-color="#4a5c6c"/><stop offset="64.29%" stop-color="#465869"/><stop offset="67.86%" stop-color="#435366"/><stop offset="71.43%" stop-color="#404f63"/><stop offset="75%" stop-color="#3d4b5f"/><stop offset="78.57%" stop-color="#3a475c"/><stop offset="82.14%" stop-color="#374259"/><stop offset="85.71%" stop-color="#343e56"/><stop offset="89.29%" stop-color="#323a52"/><stop offset="92.86%" stop-color="#2f364f"/><stop offset="96.43%" stop-color="#2c324c"/><stop offset="100%" stop-color="#292e49"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
dtcg
{
  "royal-blue-petrol": {
    "$type": "gradient",
    "$value": [
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.733,
            0.824,
            0.773
          ],
          "hex": "#bbd2c5"
        },
        "position": 0
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.325,
            0.412,
            0.463
          ],
          "hex": "#536976"
        },
        "position": 0.5
      },
      {
        "color": {
          "colorSpace": "srgb",
          "components": [
            0.161,
            0.18,
            0.286
          ],
          "hex": "#292e49"
        },
        "position": 1
      }
    ],
    "$extensions": {
      "com.brandsweets": {
        "kind": "linear",
        "css": "linear-gradient(90deg in oklab, #bbd2c5 0%, #536976 50%, #292e49 100%)",
        "interpolation": "oklab",
        "angle": 90,
        "name": "Royal Blue + Petrol",
        "contrast": {
          "white": {
            "ratio": 1.598,
            "at": 0,
            "passesAA": false,
            "passesAALarge": false
          },
          "black": {
            "ratio": 1.581,
            "at": 1,
            "passesAA": false,
            "passesAALarge": false
          },
          "suggestedInk": "#ffffff"
        }
      }
    },
    "$description": "Royal Blue + Petrol (uiGradients, MIT), rendered in OKLab."
  }
}

Tagged

Blue gradientsGreen gradientsCoolMuted

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 Royal Blue + Petrol gradient (#bbd2c5, #536976, #292e49), 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