Co-op indicator sign: the orange check

About this game

Developer: Valve · Publisher: Valve · Platform: PC (Steam) · Art style: Realistic 3D · Screen type: HUD & Gameplay UI

More Portal 2 screens in the Gallery

What to study

Aperture's feedback language reduced to one bit: an orange dot-matrix panel and a checkmark. In co-op, these illuminated signs are how the facility answers the two robots, a blue X panel (shown at 0:43 in the same trailer) for no, this orange check for yes, with no words, no colour-blind ambiguity (shape and colour both change), and enough size to be read across a chamber at a glance. The panel is a physical object, not a HUD element: a metal frame, a gridded lamp face, grime worn into the corners, mounted on a corrugated wall. Portal 2's interface design keeps choosing objects over overlays, and this is the purest example, a whole communication channel carried by a sign. Frame at about 0:45 in the Co-op Trailer (Steam), manually extracted at 45.0s. Caveat: the Co-op Trailer is a pre-rendered piece, so this is the sign as Valve rendered it for the trailer rather than a gameplay capture; the sign itself is the game's co-op indicator artwork, complete and unobstructed. Screen type is a judgment call, the manifest has no signage bucket, so this diegetic display is filed under hud-gameplay as the nearest existing type.

Patterns

How the screen is arranged.

location-label alert-banner

Components

Parts on screen.

Grid

Screen inventory

• orange dot-matrix sign panel filling the frame
• dark red checkmark glyph, bold and centred
• fine grid texture across the panel's face
• metal sign frame with grime worn into the corners
• dark corrugated chamber wall behind the sign

Top 3 colors

#0e090d 26%#060608 19%#101117 16%

Top three palette colors by share. The remaining colors make up the rest.

Source and credit

© Valve, Portal 2 screenshot: E3 Demo (Excursion Funnels), Perpetual Testing Initiative, Co-op Trailer and E3 Demo (Wheatley) videos (Steam), shown for design study and commentary. PlayCraft is an unofficial fan project, not affiliated with or endorsed by Valve.

Source tier 2 (publisher-released) · screenshot: Steam store page · Steam page

Source details

Fetched 2026-10-20. verified 2026-10-20: frame manually extracted at 45.0s from the Steam-downloaded Co-op Trailer and inspected visually at full resolution (940x528 native); the orange check sign is settled, complete and legible with no trailer text or watermark over it; pre-rendered trailer origin flagged in the study note

no published policy found (checked 2026-10-20); fair-use study use, takedown honored within 48h

Rights holders: see Copyright & takedown.