No.

isnt it 27 health (cause of some rounding)?

also

blink red if (health+armor <= 80) & (health <= 27)

sure


/* --- Health indicator --- */

menuDef {
name "healthIndicator"
fullScreen MENU_FALSE
visible MENU_TRUE
rect 269 322 31 11


itemDef {
name "healthIndicatorIcon"
rect 0 0 0 0
visible 1
decoration
style 1
backcolor 1 1 1 1
background "ui/assets/hud/health.tga"
ownerdraw CG_TEAM_COLORIZED
}

itemDef {
name "healthIndicatorCounter"
rect 0 0 31 11
visible 1
textalign 0
decoration
textstyle 0
forecolor 0.3 0.8 0.8 1
textscale 0.3
ownerdraw CG_PLAYER_HEALTH
addColorRange -999 25 1 1 1 0.6
addColorRange 26 100 1 1 1 0
addColorRange 101 999 0.3 0.8 0.8 0
}

itemDef {
name "healthIndicatorCounter"
rect 0 0 31 11
visible 1
textalign 0
decoration
textstyle 1
forecolor 0.3 0.8 0.8 0
textscale 0.3
ownerdraw CG_PLAYER_HEALTH
addColorRange -999 25 1 0 0 1
addColorRange 26 100 1 1 1 0
addColorRange 101 999 0.3 0.8 0.8 0
}

itemDef {
name "healthIndicatorCounter"
rect 0 0 31 11
visible 1
textalign 0
decoration
textstyle 0
forecolor 0.3 0.8 0.8 0.6
textscale 0.3
ownerdraw CG_PLAYER_HEALTH
addColorRange -999 25 1 0 0 0
addColorRange 26 100 1 1 1 0.6
addColorRange 101 999 0.3 0.8 0.8 0.6
}
}