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.
02 · Logo & Mark
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.
cube-logo-alt.png
Primary Cube Mon
03 · Colors
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
04 · Typography
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
All UI text, headings, buttons, labels, body copy, addresses, and amounts. Weights: 400, 500, 700.
The quick brown fox
bc1q9h4y7… · btc 0.5243
Space Grotesk
Wordmark Only
Used exclusively for the "COINCUBE" logotype. Weight: 700 Bold.
COINCUBE
Wordmark, never body copy
Noto Serif JP
Japanese Accents
Japanese characters in illustrations and accents only. Never for body copy. Weights: 400, 700.
影
Kage
05 · Wordmark
The Wordmark
Space Grotesk Bold, tracked wide. "COIN" is always Bitcoin Orange. "CUBE" adapts to background.
COINCUBE
Dark background: CUBE in White
COINCUBE
Light background: CUBE in Near-Black
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.
06 · Mascot
Kage 影
Shadow of Satoshi
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."
07 · Downloads & Resources
Assets & Artwork
Current artwork available for press, partners, and brand use. Click any card to download.
Kage Poses
Logos & Marks
Wordmarks
Type converted to outlines, so the SVG renders correctly without Space Grotesk installed. Transparent background, use the on-dark file on ink surfaces and the on-light file on paper.
Social Ready
Pre-composed at each platform's native canvas size, on brand backgrounds, ready to upload without cropping. Every size ships in both dark and light.