Brand gradient

Fly.io gradient

The gradient Fly.io's published colour tokens imply, derived by a pure function of the palette: primary → secondary in OKLab (OKLCH shorter hue when the hues are more than 140° apart; a tonal ramp when they are within ΔE 0.15), then a hero background with an ink that passes AA at the worst point along the line, a button surface with hover and active states, and the variant contact sheet. Same inputs, same gradients, forever — which is what makes them citable; the same values are served as --brand-gradient in the brand's brand.css.

#7c3aed

Open in the maker Fly.io colors →Full brand page →

Source: fly.io
Extracted: 2 September 2026
Version: 4

Fly.io

white text · worst 2.69:1 · fails

white 2.69 failsblack 1.83 failsbanding high

Hero and button

Hero background

Open in maker →

Chroma ×0.35 so it can carry text; ink white (inkFor at the midpoint). L shifted −0.15 until the ink passes AA at the worst point (4.65:1).

white 4.65 AAblack 1.17 failsbanding high

css

linear-gradient(135deg in oklch shorter hue, #786f97 0%, #443870 50%, #200c38 100%)

tailwind v4

bg-linear-to-br/oklch from-[#786f97] via-[#443870] to-[#200c38]

Button / CTA

Open in maker →

ΔL 0.08 top→bottom in the primary's hue (a lit surface, not a rainbow); hover L +0.03, active L −0.03. L shifted −0.02 so white ink passes AA on the surface and both states (worst 4.58:1).

white 5.21 AAblack 2.83 failsbanding high

Get started

hover

active

label ink passes AA on all three

css

linear-gradient(180deg in oklch shorter hue, #8242f4 0%, #6c1fd8 100%)

tailwind v4

bg-linear-to-b/oklch from-[#8242f4] to-[#6c1fd8]

Variants

Tonal ramp

Open in maker →

white 2.69 failsblack 1.83 failsbanding high

css

linear-gradient(135deg in oklch shorter hue, #ab8aff 0%, #7c3aed 50%, #4b00a4 100%)

tailwind v4

bg-linear-to-br/oklch from-[#ab8aff] via-[#7c3aed] to-[#4b00a4]

Analogous

Open in maker →

Partner hue from the analogous rule at the source colour's lightness.

white 5.29 AAblack 3.67 AA largebanding high

css

linear-gradient(135deg in oklab, #7c3aed 0%, #2160ed 100%)

tailwind v4

bg-linear-to-br/oklab from-[#7c3aed] to-[#2160ed]

Complementary

Open in maker →

Partner hue from the complementary rule at the source colour's lightness. ΔH 180° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

white 4.92 AAblack 3.66 AA largebanding medium

css

linear-gradient(135deg in oklch shorter hue, #7c3aed 0%, #707521 100%)

tailwind v4

bg-linear-to-br/oklch from-[#7c3aed] to-[#707521]

Triadic

Open in maker →

Partner hue from the triadic rule at the source colour's lightness.

white 5.22 AAblack 3.68 AA largebanding medium

css

linear-gradient(135deg in oklab, #7c3aed 0%, #a45820 100%)

tailwind v4

bg-linear-to-br/oklab from-[#7c3aed] to-[#a45820]

Report — brand gradient

white ink: worst 2.69:1 at 0% (fails AA); black ink: worst 1.83:1 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: ~10px bands at 1440px — add grain 20 (≈2% soft-light noise) or shorten the ramp.

Export

The custom properties below are byte-identical to the gradient block in brand.css; the DTCG token is what tokens.json carries.

css custom properties · brand.css

:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 2.69:1, black 1.83:1 */
  --brand-gradient: linear-gradient(135deg in oklch shorter hue, #ab8aff 0%, #7c3aed 50%, #4b00a4 100%);
  /* hero — worst-case contrast: white 4.65:1 AA, black 1.17:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklch shorter hue, #786f97 0%, #443870 50%, #200c38 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 5.21:1 AA, black 2.83:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #8242f4 0%, #6c1fd8 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #8a4dff 0%, #742de2 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #7936e9 0%, #6408cd 100%);
  --brand-gradient-button-ink: #ffffff;
}

svg · brand gradient

<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="#ab8aff"/><stop offset="3.57%" stop-color="#a785fe"/><stop offset="7.14%" stop-color="#a480fd"/><stop offset="10.71%" stop-color="#a07bfb"/><stop offset="14.29%" stop-color="#9d76fa"/><stop offset="17.86%" stop-color="#9970f9"/><stop offset="21.43%" stop-color="#966bf8"/><stop offset="25%" stop-color="#9366f6"/><stop offset="28.57%" stop-color="#8f60f5"/><stop offset="32.14%" stop-color="#8c5af4"/><stop offset="35.71%" stop-color="#8955f2"/><stop offset="39.29%" stop-color="#854ef1"/><stop offset="42.86%" stop-color="#8248f0"/><stop offset="46.43%" stop-color="#7f41ee"/><stop offset="50%" stop-color="#7c3aed"/><stop offset="53.57%" stop-color="#7837e8"/><stop offset="57.14%" stop-color="#7533e2"/><stop offset="60.71%" stop-color="#7130dd"/><stop offset="64.29%" stop-color="#6d2dd8"/><stop offset="67.86%" stop-color="#6a29d2"/><stop offset="71.43%" stop-color="#6626cd"/><stop offset="75%" stop-color="#6322c8"/><stop offset="78.57%" stop-color="#5f1ec3"/><stop offset="82.14%" stop-color="#5c1abe"/><stop offset="85.71%" stop-color="#5816b8"/><stop offset="89.29%" stop-color="#5511b3"/><stop offset="92.86%" stop-color="#520cae"/><stop offset="96.43%" stop-color="#4e06a9"/><stop offset="100%" stop-color="#4b00a4"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>

dtcg · tokens.json

{
  "gradient": {
    "brand": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.671,
              0.541,
              1
            ],
            "hex": "#ab8aff"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.486,
              0.227,
              0.929
            ],
            "hex": "#7c3aed"
          },
          "position": 0.5
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.294,
              0,
              0.643
            ],
            "hex": "#4b00a4"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(135deg in oklch shorter hue, #ab8aff 0%, #7c3aed 50%, #4b00a4 100%)",
          "interpolation": "oklch",
          "hue": "shorter",
          "angle": 135,
          "name": "brand",
          "contrast": {
            "white": {
              "ratio": 2.689,
              "at": 0,
              "passesAA": false,
              "passesAALarge": false
            },
            "black": {
              "ratio": 1.835,
              "at": 1,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "The canonical brand gradient (--brand-gradient)."
    },
    "hero": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.471,
              0.435,
              0.592
            ],
            "hex": "#786f97"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.267,
              0.22,
              0.439
            ],
            "hex": "#443870"
          },
          "position": 0.5
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.125,
              0.047,
              0.22
            ],
            "hex": "#200c38"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(135deg in oklch shorter hue, #786f97 0%, #443870 50%, #200c38 100%)",
          "interpolation": "oklch",
          "hue": "shorter",
          "angle": 135,
          "name": "hero",
          "ink": "#ffffff",
          "contrast": {
            "white": {
              "ratio": 4.647,
              "at": 0,
              "passesAA": true,
              "passesAALarge": true
            },
            "black": {
              "ratio": 1.171,
              "at": 1,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "Low-chroma hero background with a text-safe ink (--brand-gradient-hero)."
    },
    "button": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.51,
              0.259,
              0.957
            ],
            "hex": "#8242f4"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.424,
              0.122,
              0.847
            ],
            "hex": "#6c1fd8"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(180deg in oklch shorter hue, #8242f4 0%, #6c1fd8 100%)",
          "interpolation": "oklch",
          "hue": "shorter",
          "angle": 180,
          "name": "button",
          "ink": "#ffffff",
          "states": {
            "hover": "linear-gradient(180deg in oklch shorter hue, #8a4dff 0%, #742de2 100%)",
            "active": "linear-gradient(180deg in oklch shorter hue, #7936e9 0%, #6408cd 100%)"
          },
          "contrast": {
            "white": {
              "ratio": 5.205,
              "at": 0,
              "passesAA": true,
              "passesAALarge": true
            },
            "black": {
              "ratio": 2.825,
              "at": 1,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "Button / CTA surface with hover and active states (--brand-gradient-button)."
    }
  }
}

Colours

#7c3aed

mcpConnect your agent — Fly.io's gradients on demand

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

›brand_gradients for fly-io — give me the hero CSS and the ink that passes AA, then a version in oklch

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

Fly.io and its marks belong to their owner. This page uses the name nominatively to describe gradients derived from the brand's published colour values; it does not reproduce logos or other brand assets, and it is not affiliated with or endorsed by Fly.io. Owner of this brand? Request a correction or removal → Machine-readable: gradients.md