COINCUBE

Self-Custody Bitcoin

COINCUBE is a self-custodial Bitcoin application built on the conviction that financial sovereignty is a human right. The brand reflects sumi-e ink wash painting — restraint, calm, and presence. Serious. Not cute.

Core Principles

  • Ink, Not Vectors
    Hand-brushed style. Organic edges, visible texture. Soul over perfection.
  • Human, Not Robot
    Kage is a person — armored, sovereign, real. Organic proportions, genuine presence.
  • Restraint Over Detail
    Sumi-e values what is unpainted. Bold strokes. Negative space matters.
  • Hard Money, Serious Tone
    Bitcoin is not a game. The brand is calm, laconic, and direct.

The Cube Mon

The isometric cube is the COINCUBE clan mark — the app icon and primary symbol. Ink wash with a soft white halo that lets it breathe against both dark and light surfaces.

Color Palette

Three core hues: ink black, Bitcoin orange, paper white. Eight tonal variants for dimensional illustration. No other colors.

  • Bitcoin Orange
    #F7931A
  • Dark Orange
    #D4770E
  • Light Orange
    #FFB347
  • Ink Black
    #050505
  • Near-Black
    #0A0A0A
  • Dark Gray
    #1A1A1A
  • Paper White
    #FFFFFF
  • Warm Paper
    #F5F0E8

Type System

Three typefaces. IBM Plex Sans for all UI and data. Space Grotesk for the wordmark only. Noto Serif JP for Japanese accents.

  • IBM Plex Sans
    Primary / UI + Data: Weights: 400, 500, 700.
  • Space Grotesk
    Wordmark Only: Weight: 700 Bold.
  • Noto Serif JP
    Japanese Accents: Weights: 400, 700.

The Wordmark

Space Grotesk Bold, tracked wide. "COIN" is always Bitcoin Orange. "CUBE" adapts to background.

Rule Spec
Font Space Grotesk Bold, letter-spacing 0.12em
"COIN" #F7931A Bitcoin Orange — always
"CUBE" on dark #FFFFFF White
"CUBE" on light #0A0A0A Near-Black
Minimum size 14px font. Below this, use cube mark only.

Kage 影

Kage means "shadow" in Japanese. A samurai seen from behind, face hidden, presence always felt. He does not speak often. When he does, it matters.

"In the age of digital feudalism — where centralized institutions hold the keys to the people's wealth — one warrior walks alone. Forged from ink and lightning, Kage carries no lord's banner. He is not a guardian appointed by authority. He is the shadow that falls wherever sovereignty is claimed."

Assets & Artwork

Current artwork available for press, partners, and brand use. Click any card to download.

Kage Poses

Rear View Guardian

Standing Guardian

Helm / Bust

Seated Guardian

Sumi-e Silhouette

Walking Away

Legacy Guardian

Shadow of Satoshi Seal

Logos & Marks

Cube Mon

Brand Fonts