背景色変更ツール

はい、RGBやHEXコードで任意の色を指定できます。カラーピッカーでの選択も可能です。

はい、2色以上を使ったグラデーション背景も作成できます。

もちろんです。元の画像はそのままで、背景色だけが変更されます。

For portrait headshots: cool, desaturated colours read `professional` and `trustworthy` in colour-theory research — corporate navy (#0A2540), slate grey (#475569 Tailwind Slate 600), deep teal (#134E4A Tailwind Teal 900), and warm charcoal (#1F2937 Tailwind Gray 800) all flatter most skin tones because they sit on the cool side of the colour wheel where most skin undertones look balanced. Avoid saturated warm backgrounds for headshots — a bright orange or red competes with skin warmth and makes the face look ruddy. For product shots: the rule depends on the product's dominant hue. Complementary backgrounds (the colour opposite on the colour wheel) make the product pop — a navy product against a soft amber backdrop, a red product against a desaturated teal, an orange product against a deep blue. Analogous backgrounds (colours adjacent on the wheel) read `cohesive` and `branded` rather than `attention-grabbing` — a teal product against a desaturated cyan, a red product against a coral. Both work; the choice is whether you want the product to stand out (complementary) or feel like part of a brand-system family (analogous). For the specific corporate-blue case, see `/corporate-blue-background/`.

Short answer: work in sRGB. A hex colour you pick on screen is an sRGB value, and sRGB is the safest universal target for web display, social media, marketplace listings and any tool that does not read a wider colour profile. It covers about 35% of the visible CIE 1931 colour space and is what browsers assume for images without an embedded profile. Wide-gamut points: (1) Display P3, the wider colour space on many recent phones and laptops, renders saturated reds, greens and oranges more vividly than sRGB, but a P3 file shown on an sRGB-only screen falls back to clipped colours; for mixed-audience web work, sRGB is correct. (2) Wider print-oriented RGB spaces matter only when the destination is a colour-managed print workflow; ignore them for web. (3) Pantone PMS for true ink colour needs a printed Pantone swatch book as the reference: an sRGB approximation (for example PMS 286 ≈ #0033A0) is right for screens, but a printer matching the ink on press uses the official Pantone ink mix, not the hex. For brand-guide assets that span screen and print, document both values: the sRGB hex for digital and the PMS callout for print.