ag_UF

[Ururu]

можно в файле AddOns\ag_UnitFrames\modules\healthbar\ healthbar.lua заменить это

local function colorGradient(perc)
    local healthColor = aUF.db.profile.HealthColor
    if perc and perc >= 1 then
        return healthColor.r, healthColor.g, healthColor.b    
    elseif (perc and perc <= 0) or not perc then
        local r, g, b = red[1], red[2], red[3]
        return r, g, b
    end

    local _, relperc = math.modf(perc*2)
    local r1, g1, b1, r2, g2, b2
    if perc >= 0.5 then    
        r2, g2, b2 = healthColor.r, healthColor.g, healthColor.b
        r1, g1, b1 = yellow[1], yellow[2], yellow[3]
    else
        r2, g2, b2 = yellow[1], yellow[2], yellow[3]
        r1, g1, b1 = red[1], red[2], red[3]
    end
    return r1 + (r2-r1)*relperc, g1 + (g2-g1)*relperc, b1 + (b2-b1)*relperc
end 

на это

local function colorGradient(p)
    if not p or p <= 0 then return .9, .2, .3
    else
        local c = aUF.db.profile.HealthColor
        return c.r, c.g, c.b
    end
end