Brand gradient

Casper Sleep gradient

The gradient Casper Sleep'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.

#cc3b31 #e9a49c #1e306e

Open in the maker Casper Sleep colors →Full brand page →consumer

Source: casper.com
Extracted: 2 September 2026
Version: 4

Casper Sleep

black text · worst 4.24:1 · AA large

white 2.05 failsblack 4.24 AA largebanding 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 −0.22 until the ink passes AA at the worst point (4.58:1).

white 4.58 AAblack 1.70 failsbanding medium

css

linear-gradient(135deg in oklab, #572620 0%, #88706c 100%)

tailwind v4

bg-linear-to-br/oklab from-[#572620] to-[#88706c]

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 −0.05 so white ink passes AA on the surface and both states (worst 4.56:1).

white 5.20 AAblack 2.87 failsbanding high

Get started

hover

active

label ink passes AA on all three

css

linear-gradient(180deg in oklch shorter hue, #c8372e 0%, #ac1513 100%)

tailwind v4

bg-linear-to-b/oklch from-[#c8372e] to-[#ac1513]

Variants

Tonal ramp

Open in maker →

white 2.55 failsblack 2.10 failsbanding high

css

linear-gradient(135deg in oklch shorter hue, #ff7a6a 0%, #cc3b31 50%, #8b0000 100%)

tailwind v4

bg-linear-to-br/oklch from-[#ff7a6a] via-[#cc3b31] to-[#8b0000]

Analogous

Open in maker →

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

white 4.95 AAblack 4.17 AA largebanding high

css

linear-gradient(135deg in oklab, #cc3b31 0%, #c43975 100%)

tailwind v4

bg-linear-to-br/oklab from-[#cc3b31] to-[#c43975]

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 4.28 AA largeblack 4.22 AA largebanding high

css

linear-gradient(135deg in oklch shorter hue, #cc3b31 0%, #35838e 100%)

tailwind v4

bg-linear-to-br/oklch from-[#cc3b31] to-[#35838e]

Triadic

Open in maker →

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

white 4.28 AA largeblack 4.23 AA largebanding high

css

linear-gradient(135deg in oklab, #cc3b31 0%, #358a49 100%)

tailwind v4

bg-linear-to-br/oklab from-[#cc3b31] to-[#358a49]

Report — brand gradient

white ink: worst 2.05:1 at 100% (fails AA); black ink: worst 4.24:1 at 0% (AA-large only) → use black text.
Body text fails AA everywhere on this gradient; large text (≥24px / 19px bold) is fine. Add a scrim or lower the chroma for body copy.
Banding medium: ~13px bands at 1440px — add grain 28 (≈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 2.05:1, black 4.24:1 AA-large */
  --brand-gradient: linear-gradient(135deg in oklab, #cc3b31 0%, #e9a49c 100%);
  /* hero — worst-case contrast: white 4.58:1 AA, black 1.70:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklab, #572620 0%, #88706c 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 5.20:1 AA, black 2.87:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #c8372e 0%, #ac1513 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #d34237 0%, #b7241e 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #be2c24 0%, #a20005 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="#cc3b31"/><stop offset="7.14%" stop-color="#cf4439"/><stop offset="14.29%" stop-color="#d14d42"/><stop offset="21.43%" stop-color="#d45549"/><stop offset="28.57%" stop-color="#d65d51"/><stop offset="35.71%" stop-color="#d86559"/><stop offset="42.86%" stop-color="#db6c60"/><stop offset="50%" stop-color="#dd7468"/><stop offset="57.14%" stop-color="#df7b6f"/><stop offset="64.29%" stop-color="#e18277"/><stop offset="71.43%" stop-color="#e2897e"/><stop offset="78.57%" stop-color="#e49086"/><stop offset="85.71%" stop-color="#e6968d"/><stop offset="92.86%" stop-color="#e89d94"/><stop offset="100%" stop-color="#e9a49c"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>

dtcg · tokens.json

{
  "gradient": {
    "brand": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.8,
              0.231,
              0.192
            ],
            "hex": "#cc3b31"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.914,
              0.643,
              0.612
            ],
            "hex": "#e9a49c"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(135deg in oklab, #cc3b31 0%, #e9a49c 100%)",
          "interpolation": "oklab",
          "angle": 135,
          "name": "brand",
          "contrast": {
            "white": {
              "ratio": 2.048,
              "at": 1,
              "passesAA": false,
              "passesAALarge": false
            },
            "black": {
              "ratio": 4.237,
              "at": 0,
              "passesAA": false,
              "passesAALarge": true
            },
            "suggestedInk": "#000000"
          }
        }
      },
      "$description": "The canonical brand gradient (--brand-gradient)."
    },
    "hero": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.341,
              0.149,
              0.125
            ],
            "hex": "#572620"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.533,
              0.439,
              0.424
            ],
            "hex": "#88706c"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(135deg in oklab, #572620 0%, #88706c 100%)",
          "interpolation": "oklab",
          "angle": 135,
          "name": "hero",
          "ink": "#ffffff",
          "contrast": {
            "white": {
              "ratio": 4.584,
              "at": 1,
              "passesAA": true,
              "passesAALarge": true
            },
            "black": {
              "ratio": 1.703,
              "at": 0,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "Low-chroma hero background with a text-safe ink (--brand-gradient-hero)."
    },
    "button": {
      "$type": "gradient",
      "$value": [
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.784,
              0.216,
              0.18
            ],
            "hex": "#c8372e"
          },
          "position": 0
        },
        {
          "color": {
            "colorSpace": "srgb",
            "components": [
              0.675,
              0.082,
              0.075
            ],
            "hex": "#ac1513"
          },
          "position": 1
        }
      ],
      "$extensions": {
        "com.brandsweets": {
          "kind": "linear",
          "css": "linear-gradient(180deg in oklch shorter hue, #c8372e 0%, #ac1513 100%)",
          "interpolation": "oklch",
          "hue": "shorter",
          "angle": 180,
          "name": "button",
          "ink": "#ffffff",
          "states": {
            "hover": "linear-gradient(180deg in oklch shorter hue, #d34237 0%, #b7241e 100%)",
            "active": "linear-gradient(180deg in oklch shorter hue, #be2c24 0%, #a20005 100%)"
          },
          "contrast": {
            "white": {
              "ratio": 5.196,
              "at": 0,
              "passesAA": true,
              "passesAALarge": true
            },
            "black": {
              "ratio": 2.871,
              "at": 1,
              "passesAA": false,
              "passesAALarge": false
            },
            "suggestedInk": "#ffffff"
          }
        }
      },
      "$description": "Button / CTA surface with hover and active states (--brand-gradient-button)."
    }
  }
}

Colours

#cc3b31 #e9a49c #1e306e

mcpConnect your agent — Casper Sleep'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 casper-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.

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