Brand gradient

Mercury gradient

The gradient Mercury'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.

#323341 #9cb4e8 #fc92b4

Open in the maker Mercury colors →Full brand page →

Source: mercury.com
Extracted: 2 September 2026
Version: 3

Mercury

white text · worst 2.08:1 · fails

white 2.08 failsblack 1.69 failsbanding medium

Hero and button

Hero background

Open in maker →

Chroma ×0.35 so it can carry text; ink white (inkFor at the midpoint). L shifted −0.21 until the ink passes AA at the worst point (4.57:1).

white 4.57 AAblack 1.05 failsbanding medium

css

linear-gradient(135deg in oklab, #08080c 0%, #6d7688 100%)

tailwind v4

bg-linear-to-br/oklab from-[#08080c] to-[#6d7688]

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. White ink passes AA on the surface and both states (worst 9.44:1).

white 10.69 AAblack 1.46 failsbanding high

Get started

hover

active

label ink passes AA on all three

css

linear-gradient(180deg in oklch shorter hue, #3c3d4c 0%, #282937 100%)

tailwind v4

bg-linear-to-b/oklch from-[#3c3d4c] to-[#282937]

Variants

Tonal ramp

Open in maker →

white 5.85 AAblack 1.06 failsbanding high

css

linear-gradient(135deg in oklch shorter hue, #626473 0%, #323341 50%, #090914 100%)

tailwind v4

bg-linear-to-br/oklch from-[#626473] via-[#323341] to-[#090914]

Analogous

Open in maker →

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

white 12.30 AAblack 1.68 failsbanding high

css

linear-gradient(135deg in oklab, #323341 0%, #30353b 100%)

tailwind v4

bg-linear-to-br/oklab from-[#323341] to-[#30353b]

Complementary

Open in maker →

Partner hue from the complementary rule at the source colour's lightness. ΔH 175° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

white 12.22 AAblack 1.68 failsbanding high

css

linear-gradient(135deg in oklch shorter hue, #323341 0%, #353530 100%)

tailwind v4

bg-linear-to-br/oklch from-[#323341] to-[#353530]

Triadic

Open in maker →

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

white 12.42 AAblack 1.67 failsbanding high

css

linear-gradient(135deg in oklab, #323341 0%, #3a322f 100%)

tailwind v4

bg-linear-to-br/oklab from-[#323341] to-[#3a322f]

Report — brand gradient

white ink: worst 2.08:1 at 100% (fails AA); black ink: worst 1.69:1 at 0% (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 medium: ~9px bands at 1440px — add grain 18 (≈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 2.08:1, black 1.69:1 */
  --brand-gradient: linear-gradient(135deg in oklab, #323341 0%, #9cb4e8 100%);
  /* hero — worst-case contrast: white 4.57:1 AA, black 1.05:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklab, #08080c 0%, #6d7688 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 10.69:1 AA, black 1.46:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #3c3d4c 0%, #282937 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #444554 0%, #2f303e 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #353644 0%, #21222f 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="#323341"/><stop offset="7.14%" stop-color="#393b4c"/><stop offset="14.29%" stop-color="#404456"/><stop offset="21.43%" stop-color="#474c62"/><stop offset="28.57%" stop-color="#4e556d"/><stop offset="35.71%" stop-color="#565e78"/><stop offset="42.86%" stop-color="#5d6784"/><stop offset="50%" stop-color="#657090"/><stop offset="57.14%" stop-color="#6c799c"/><stop offset="64.29%" stop-color="#7483a8"/><stop offset="71.43%" stop-color="#7c8db5"/><stop offset="78.57%" stop-color="#8496c1"/><stop offset="85.71%" stop-color="#8ca0ce"/><stop offset="92.86%" stop-color="#94aadb"/><stop offset="100%" stop-color="#9cb4e8"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>

dtcg · tokens.json

{
  "gradient": {
    "brand": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.196,
              0.2,
              0.255
            ],
            "hex": "#323341"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.612,
              0.706,
              0.91
            ],
            "hex": "#9cb4e8"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(135deg in oklab, #323341 0%, #9cb4e8 100%)",
          "interpolation": "oklab",
          "angle": 135,
          "name": "brand",
          "contrast": {
            "white": {
              "ratio": 2.078,
              "at": 1,
              "passesAA": false,
              "passesAALarge": false
            },
            "black": {
              "ratio": 1.685,
              "at": 0,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "The canonical brand gradient (--brand-gradient)."
    },
    "hero": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.031,
              0.031,
              0.047
            ],
            "hex": "#08080c"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.427,
              0.463,
              0.533
            ],
            "hex": "#6d7688"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(135deg in oklab, #08080c 0%, #6d7688 100%)",
          "interpolation": "oklab",
          "angle": 135,
          "name": "hero",
          "ink": "#ffffff",
          "contrast": {
            "white": {
              "ratio": 4.568,
              "at": 1,
              "passesAA": true,
              "passesAALarge": true
            },
            "black": {
              "ratio": 1.05,
              "at": 0,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "Low-chroma hero background with a text-safe ink (--brand-gradient-hero)."
    },
    "button": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.235,
              0.239,
              0.298
            ],
            "hex": "#3c3d4c"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.157,
              0.161,
              0.216
            ],
            "hex": "#282937"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(180deg in oklch shorter hue, #3c3d4c 0%, #282937 100%)",
          "interpolation": "oklch",
          "hue": "shorter",
          "angle": 180,
          "name": "button",
          "ink": "#ffffff",
          "states": {
            "hover": "linear-gradient(180deg in oklch shorter hue, #444554 0%, #2f303e 100%)",
            "active": "linear-gradient(180deg in oklch shorter hue, #353644 0%, #21222f 100%)"
          },
          "contrast": {
            "white": {
              "ratio": 10.693,
              "at": 0,
              "passesAA": true,
              "passesAALarge": true
            },
            "black": {
              "ratio": 1.463,
              "at": 0.9841,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "Button / CTA surface with hover and active states (--brand-gradient-button)."
    }
  }
}

Colours

#323341 #9cb4e8 #fc92b4

mcpConnect your agent — Mercury'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 mercury-com — 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.

Mercury 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 Mercury. Owner of this brand? Request a correction or removal → Machine-readable: gradients.md