Brand gradient
Astro gradient
The gradient Astro'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.
- Source
- astro.build
- Extracted
- Version
- 6
Hero and button
Hero background
Open in maker →Chroma ×0.35 so it can carry text; ink white (inkFor at the midpoint). L shifted −0.20 until the ink passes AA at the worst point (4.65:1).
linear-gradient(135deg in oklab, #263d57 0%, #597890 100%)
bg-linear-to-br/oklab from-[#263d57] to-[#597890]
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 −0.08 so white ink passes AA on the surface and both states (worst 4.72:1).
linear-gradient(180deg in oklch shorter hue, #236cb9 0%, #00549f 100%)
bg-linear-to-b/oklch from-[#236cb9] to-[#00549f]
Variants
Tonal ramp
Open in maker →linear-gradient(135deg in oklch shorter hue, #69b0ff 0%, #3178c6 50%, #00428c 100%)
bg-linear-to-br/oklch from-[#69b0ff] via-[#3178c6] to-[#00428c]
Analogous
Open in maker →Partner hue from the analogous rule at the source colour's lightness.
linear-gradient(135deg in oklab, #3178c6 0%, #35819b 100%)
bg-linear-to-br/oklab from-[#3178c6] to-[#35819b]
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.
linear-gradient(135deg in oklch shorter hue, #3178c6 0%, #986d2f 100%)
bg-linear-to-br/oklch from-[#3178c6] to-[#986d2f]
Triadic
Open in maker →Partner hue from the triadic rule at the source colour's lightness.
linear-gradient(135deg in oklab, #3178c6 0%, #c93a57 100%)
bg-linear-to-br/oklab from-[#3178c6] to-[#c93a57]
Report — brand gradient
- white ink: worst 2.15:1 at 100% (fails AA); black ink: worst 4.63:1 at 0% (AA) → use black text.
- Banding high: ~22px bands at 1440px — add grain 43 (≈3% 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.
:root {
/* Brand gradient (derived) */
/* worst-case contrast: white 2.15:1, black 4.63:1 AA */
--brand-gradient: linear-gradient(135deg in oklab, #3178c6 0%, #54b9ff 100%);
/* hero — worst-case contrast: white 4.65:1 AA, black 1.89:1; ink passes AA at the worst point */
--brand-gradient-hero: linear-gradient(135deg in oklab, #263d57 0%, #597890 100%);
--brand-gradient-hero-ink: #ffffff;
/* button — worst-case contrast: white 5.36:1 AA, black 2.77:1 */
--brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #236cb9 0%, #00549f 100%);
--brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #2e75c3 0%, #0f5da8 100%);
--brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #1863af 0%, #004b95 100%);
--brand-gradient-button-ink: #ffffff;
}<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="#3178c6"/><stop offset="7.14%" stop-color="#337dca"/><stop offset="14.29%" stop-color="#3681ce"/><stop offset="21.43%" stop-color="#3886d2"/><stop offset="28.57%" stop-color="#3a8ad6"/><stop offset="35.71%" stop-color="#3d8fda"/><stop offset="42.86%" stop-color="#3f93de"/><stop offset="50%" stop-color="#4298e2"/><stop offset="57.14%" stop-color="#449de6"/><stop offset="64.29%" stop-color="#47a1ea"/><stop offset="71.43%" stop-color="#49a6ef"/><stop offset="78.57%" stop-color="#4cabf3"/><stop offset="85.71%" stop-color="#4fb0f7"/><stop offset="92.86%" stop-color="#51b4fb"/><stop offset="100%" stop-color="#54b9ff"/></linearGradient></defs><rect width="1440" height="600" fill="url(#bs-gradient)"/></svg>
{
"gradient": {
"brand": {
"$type": "gradient",
"$value": [
{
"color": {
"colorSpace": "srgb",
"components": [
0.192,
0.471,
0.776
],
"hex": "#3178c6"
},
"position": 0
},
{
"color": {
"colorSpace": "srgb",
"components": [
0.329,
0.725,
1
],
"hex": "#54b9ff"
},
"position": 1
}
],
"$extensions": {
"com.brandsweets": {
"kind": "linear",
"css": "linear-gradient(135deg in oklab, #3178c6 0%, #54b9ff 100%)",
"interpolation": "oklab",
"angle": 135,
"name": "brand",
"contrast": {
"white": {
"ratio": 2.152,
"at": 1,
"passesAA": false,
"passesAALarge": false
},
"black": {
"ratio": 4.633,
"at": 0,
"passesAA": true,
"passesAALarge": true
},
"suggestedInk": "#000000"
}
}
},
"$description": "The canonical brand gradient (--brand-gradient)."
},
"hero": {
"$type": "gradient",
"$value": [
{
"color": {
"colorSpace": "srgb",
"components": [
0.149,
0.239,
0.341
],
"hex": "#263d57"
},
"position": 0
},
{
"color": {
"colorSpace": "srgb",
"components": [
0.349,
0.471,
0.565
],
"hex": "#597890"
},
"position": 1
}
],
"$extensions": {
"com.brandsweets": {
"kind": "linear",
"css": "linear-gradient(135deg in oklab, #263d57 0%, #597890 100%)",
"interpolation": "oklab",
"angle": 135,
"name": "hero",
"ink": "#ffffff",
"contrast": {
"white": {
"ratio": 4.652,
"at": 1,
"passesAA": true,
"passesAALarge": true
},
"black": {
"ratio": 1.888,
"at": 0,
"passesAA": false,
"passesAALarge": false
},
"suggestedInk": "#ffffff"
}
}
},
"$description": "Low-chroma hero background with a text-safe ink (--brand-gradient-hero)."
},
"button": {
"$type": "gradient",
"$value": [
{
"color": {
"colorSpace": "srgb",
"components": [
0.137,
0.424,
0.725
],
"hex": "#236cb9"
},
"position": 0
},
{
"color": {
"colorSpace": "srgb",
"components": [
0,
0.329,
0.624
],
"hex": "#00549f"
},
"position": 1
}
],
"$extensions": {
"com.brandsweets": {
"kind": "linear",
"css": "linear-gradient(180deg in oklch shorter hue, #236cb9 0%, #00549f 100%)",
"interpolation": "oklch",
"hue": "shorter",
"angle": 180,
"name": "button",
"ink": "#ffffff",
"states": {
"hover": "linear-gradient(180deg in oklch shorter hue, #2e75c3 0%, #0f5da8 100%)",
"active": "linear-gradient(180deg in oklch shorter hue, #1863af 0%, #004b95 100%)"
},
"contrast": {
"white": {
"ratio": 5.361,
"at": 0,
"passesAA": true,
"passesAALarge": true
},
"black": {
"ratio": 2.769,
"at": 1,
"passesAA": false,
"passesAALarge": false
},
"suggestedInk": "#ffffff"
}
}
},
"$description": "Button / CTA surface with hover and active states (--brand-gradient-button)."
}
}
}Colours
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.
https://mcp.brandsweets.com/gradients/mcpclaude mcp add --transport http brandsweets-gradients https://mcp.brandsweets.com/gradients/mcp
›brand_gradients for astro-build — give me the hero CSS and the ink that passes AA, then a version in oklch
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Astro 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 Astro. Owner of this brand? Request a correction or removal → Machine-readable: gradients.md